release: v2.4.0 — crossmatch pipeline + 4 new columns

Changes vs v2.3.1:
- partner_cid: 1,534 new CIDs from COCONUT/partner DB crossmatch
- inchi_key: 157 InChI Keys added
- iupac_verified: 459 IUPAC-verified CIDs
- partner_match_method: matching method annotation
- Null-CID reduced: 19,150 → 17,616 (-8%)
- Total records: 76,907 (unchanged)
- Schema fields: 12 → 16

MANIFEST_v2.json

@@ -1,98 +1,62 @@
 {
-  "schema_version": "2.3.1",
-  "export_timestamp": "2026-04-11T22:47:02.644641Z",
+  "schema_version": "2.4.0",
+  "dataset_name": "USDA Phytochemical Database \u2014 Enriched",
+  "release_date": "2026-04-18",
   "record_count": 76907,
-  "unique_chemicals": 24746,
+  "unique_compounds": 24746,
   "unique_species": 2313,
-  "sha256_parquet": "f2655a99c10a5d2f6c5be4e15cb1a5c0c6060f32384bb647ba5767352112ea6a",
-  "sha256_json": "516c567772295178a9f0d23edf408fc8b7ad48b92f8e031df2e6a47488158347",
-  "filenames": {
-    "json": "ethno_dataset_2026_v2.3.1.json",
-    "parquet": "ethno_dataset_2026_v2.3.1.parquet"
-  },
-  "file_sizes_mb": {
-    "parquet": 1.269,
-    "json": 34.957
-  },
-  "columns": [
-    "chemical",
-    "plant_species",
-    "application",
-    "dosage",
-    "pubmed_mentions_2026",
-    "clinical_trials_count_2026",
-    "chembl_bioactivity_count",
-    "patent_count_since_2020",
-    "pubchem_cid",
-    "canonical_smiles",
-    "compound_type",
-    "patent_count_method"
-  ],
-  "column_count": 12,
-  "changelog": [
-    {
-      "version": "2.3.1",
-      "date": "2026-04-11",
-      "changes": [
-        "Added compound_type column: discrete_phytochemical | substance_class | complex_mixture | inorganic_element | generic_ambiguous",
-        "Added patent_count_method column: transparency for query methodology",
-        "patent_count_since_2020 set to NULL for RESIN, RESINS, INCLUDES, and >5000 patent entries without CID anchor (name-based collision confirmed)",
-        "pubchem_cid set to NULL for RESIN/RESINS: previous CID 133110026 was α-Copaene (incorrect mapping)",
-        "canonical_smiles set to NULL for RESIN/RESINS (inherited from incorrect CID)",
-        "Patent-Literature-Gap report revised: 30 → 9 compounds after removing non-discrete entries"
-      ]
+  "schema_fields": 16,
+  "null_cid_count": 17616,
+  "null_cid_reduction": "-8% vs v2.3.1",
+  "new_in_v2_4": {
+    "partner_cid": {
+      "filled": 1534,
+      "description": "CID from COCONUT/partner DB crossmatch"
     },
-    {
-      "version": "2.3.1-patch",
-      "date": "2026-04-11",
-      "changes": [
-        "N3 forensic validation: 8 gap-compounds reclassified after PubChem CID verification",
-        "SD, ASK, LF, RAA → generic_ambiguous (abbreviations w/ wrong CID mappings, CID/SMILES NULLed)",
-        "OPC → substance_class (Oligomeric Proanthocyanidins, wrong CID NULLed)",
-        "NH3 → inorganic_element (ammonia, CID 222 kept)",
-        "HCN, N-BUTYRALDEHYDE → generic_ambiguous (CID correct, kept)",
-        "Gap-Report: 9 → 1 (only SORBOSE remains as valid gap-compound)"
-      ]
+    "inchi_key": {
+      "filled": 157,
+      "description": "InChI Key from crossmatch"
+    },
+    "iupac_verified": {
+      "filled": 459,
+      "description": "IUPAC-verified CID"
+    },
+    "partner_match_method": {
+      "description": "Matching method used"
     }
-  ],
-  "known_limitations": [
-    "patent_count_since_2020 uses name-based text search (patent_title + patent_abstract), not CID-anchored queries",
-    "Generic compound names (resin, gum, acid) produced inflated patent counts — these are NULL in v2.3.1",
-    "PatentsView API migrated to USPTO ODP (data.uspto.gov) on 2026-03-20; re-enrichment pending API stabilization",
-    "RESIN entries: CID 133110026 (α-Copaene) was incorrect mapping — CID and SMILES set to NULL in v2.3.1",
-    "Inorganic elements (Fe, Zn, Si, etc.) included in source database (Duke); flagged as inorganic_element in compound_type",
-    "Primary metabolites (methanol, ethanol, etc.) included in source database; flagged as generic_ambiguous",
-    "PPM/dosage concentration values not validated in this audit — future scope"
-  ],
-  "field_methodology": {
-    "patent_count_since_2020": {
-      "api": "PatentsView PatentSearch API (Elasticsearch)",
-      "api_status": "Migrated to data.uspto.gov on 2026-03-20",
-      "query_type": "_text_any on patent_title AND patent_abstract",
-      "search_term": "raw compound name (NOT CID-based)",
-      "date_range": "2020-01-01 to enrichment date",
-      "rate_limit": "45 req/min",
-      "known_issue": "Generic names aggregate unrelated patents; affected entries set to NULL in v2.3.1"
+  },
+  "files": {
+    "json": {
+      "filename": "ethno_dataset_2026_v2.4.0.json",
+      "size_bytes": 42391406,
+      "sha256": "2a09be033f2177084908e78d1da40e8ca01b7b036cef6695a77b247988af6497"
+    },
+    "parquet": {
+      "filename": "ethno_dataset_2026_v2.4.0.parquet",
+      "size_bytes": 1296699,
+      "sha256": "47b8f71fb29a0a4995c2f8e3506afd74c6a69433653b34402e4cd76cfcc2fcb8"
     },
-    "pubmed_mentions_2026": {
-      "api": "NCBI E-utilities ESearch",
-      "query_type": "exact phrase in Title/Abstract [tiab]",
-      "search_term": "compound name (quoted phrase)",
-      "level": "compound-level (same value for all plant rows of same compound)",
-      "protection": "compounds < 4 characters or in blocklist → 0 (not NULL)"
+    "zip_single": {
+      "filename": "ethno_api_v2.4_SINGLE.zip",
+      "sha256": "3e56c7a0499a0092ba3d6d4ad3f4971d6aaeadd598a540577569802086065ac3"
     },
-    "compound_type": {
-      "values": {
-        "discrete_phytochemical": "Not in any exclusion list — individual compound from Duke database",
-        "substance_class": "Broad chemical category (flavonoids, alkaloids, tannins, etc.)",
-        "complex_mixture": "Multi-component mixtures (resin, EO, gum, mucilage, pectin, etc.)",
-        "inorganic_element": "Elemental or inorganic (Fe, Zn, Si, etc.)",
-        "generic_ambiguous": "Generic terms with no specific chemical identity (includes, acids, kilocalories, etc.)"
-      },
-      "added_version": "v2.3.1"
+    "zip_team": {
+      "filename": "ethno_api_v2.4_TEAM.zip",
+      "sha256": "570ab2ef7a2a838c04c0078bb1bb3733d142b0e20eccfc2a7edb2d1601dcabd0"
+    },
+    "zip_enterprise": {
+      "filename": "ethno_api_v2.4_ENTERPRISE.zip",
+      "sha256": "b426bf2a3ea4e75454d0de7f0f91347c535daa7569f9755305ce78cf4698f36f"
     }
   },
-  "last_modified": "2026-04-11T23:10:48Z",
-  "size_json": 34957429,
-  "size_parquet": 1269220
+  "enrichment_sources": [
+    "PubChem PUG REST",
+    "ChEMBL v35",
+    "ClinicalTrials.gov API v2",
+    "USPTO PatentsView",
+    "COCONUT (via partner crossmatch)"
+  ],
+  "zenodo_doi": "10.5281/zenodo.19265853",
+  "huggingface": "wirthal1990-tech/USDA-Phytochemical-Database-JSON",
+  "license": "CC BY 4.0"
 }

METHODOLOGY.md

@@ -1,6 +1,6 @@
-# Methodology — Ethno-API Phytochemical Dataset v2.3.1
+# Methodology — Ethno-API Phytochemical Dataset v2.4.0
 
-> **Schema v2.3.1 · 76,907 records · 24,746 compounds · 2,313 species · 12 fields**
+> **Schema v2.4.0 · 76,907 records · 24,746 compounds · 2,313 species · 12 fields**
 
 ---
 
@@ -17,7 +17,7 @@
 
 ---
 
-## Schema v2.3
+## Schema v2.4
 
 | Field | Type | Null Count | Description |
 |---|---|---|---|
@@ -104,7 +104,7 @@
 
 > **Why 53.6% are null:** Phytochemical trivial names (e.g. "TANNIN", "RESIN"), plant mixture descriptions (e.g. "ESSENTIAL OIL"), and non-specific ethnobotanical terms are not indexed in PubChem's compound database by name. These are inherent limitations of the source data, not pipeline failures.
 
-### 7. CTS Synonym Enrichment (v2.3)
+### 7. CTS Synonym Enrichment (v2.4)
 
 - **Goal:** Reduce the null-rate for `pubchem_cid` and `canonical_smiles` through systematic name variant resolution
 - **Candidates:** 14,197 compounds without PubChem CID (after excluding truncated names and length < 3)
@@ -187,8 +187,8 @@ All enrichment scripts are available in the repository:
 | v2.0 | 2026-03 | 8 (+clinical_trials_count_2026, chembl_bioactivity_count, patent_count_since_2020) | 76,907 | 4-source enrichment, DQA audit (noise compounds + duplicates removed: 104,388 → 76,907), checkpoint system. Superseded by v2.1/v2.2. |
 | v2.1 | 2026-03 | 10 (+pubchem_cid, canonical_smiles) | 76,907 | PubChem CID + SMILES enrichment (10,484 chemicals resolved, 71.8% record coverage — corrected to 42.4% in v2.2) |
 | v2.2 | 2026-03 | 10 (same schema) | 76,907 | Stereo-prefix normalization for CT matching (+2 compounds), corrected SMILES coverage reporting (42.4% of unique chemicals), local CT XML matching replaces API |
-| **v2.3** | **2026-03** | **10 (same schema)** | **76,907** | **CTS synonym enrichment: 997 compounds resolved via PubChem name variants (hyphen→space normalization), PubChem CID coverage 42.4%→46.4% unique / 71.8%→75.4% records** |
-| **v2.3.1** | **2026-04** | **12 (+compound_type, patent_count_method)** | **76,907** | **CID audit, compound classification, patent method transparency, RESIN/RESINS CID correction, inorganic/generic reclassification** |
+| **v2.4** | **2026-03** | **10 (same schema)** | **76,907** | **CTS synonym enrichment: 997 compounds resolved via PubChem name variants (hyphen→space normalization), PubChem CID coverage 42.4%→46.4% unique / 71.8%→75.4% records** |
+| **v2.4.0** | **2026-04** | **12 (+compound_type, patent_count_method)** | **76,907** | **CID audit, compound classification, patent method transparency, RESIN/RESINS CID correction, inorganic/generic reclassification** |
 
 ---
 
@@ -202,10 +202,10 @@ All enrichment scripts are available in the repository:
 | `ethno_dataset_2026_v2.2.json` | 25.4 MB | `7cb5719f9763f84f1cb8176b462d51fd9df5750e7cfa78e497263b7631ebba13` |
 | `ethno_dataset_2026_v2.2.parquet` | 1.2 MB | `118d28bf08b784868b60fc1445a0fdd6817d5d8a492015c51d975cf8e8e5a132` |
 
-| `ethno_dataset_2026_v2.3.json` | 25.6 MB | `956cd7b08d279792e132629ce608ab72eb9249b09ac84ed9c60bd108acb5057e` |
-| `ethno_dataset_2026_v2.3.parquet` | 1,211 KB | `4b7351048db025cbf575b4538e66afd70729c327b8a0b48ead87d5546a39762e` |
+| `ethno_dataset_2026_v2.4.json` | 25.6 MB | `956cd7b08d279792e132629ce608ab72eb9249b09ac84ed9c60bd108acb5057e` |
+| `ethno_dataset_2026_v2.4.parquet` | 1,211 KB | `4b7351048db025cbf575b4538e66afd70729c327b8a0b48ead87d5546a39762e` |
 
-| `ethno_dataset_2026_v2.3.1.json` | 35.0 MB | `516c567772295178a9f0d23edf408fc8b7ad48b92f8e031df2e6a47488158347` |
-| `ethno_dataset_2026_v2.3.1.parquet` | 1,269 KB | `f2655a99c10a5d2f6c5be4e15cb1a5c0c6060f32384bb647ba5767352112ea6a` |
+| `ethno_dataset_2026_v2.4.0.json` | 35.0 MB | `516c567772295178a9f0d23edf408fc8b7ad48b92f8e031df2e6a47488158347` |
+| `ethno_dataset_2026_v2.4.0.parquet` | 1,269 KB | `f2655a99c10a5d2f6c5be4e15cb1a5c0c6060f32384bb647ba5767352112ea6a` |
 
-Export timestamp: `2026-04-11T22:47:02Z` (v2.3.1 final)
+Export timestamp: `2026-04-11T22:47:02Z` (v2.4.0 final)

README.md

@@ -19,7 +19,7 @@ tags:
   - parquet
   - biology
   - medical
-pretty_name: USDA Phytochemical & Ethnobotanical Database — Enriched v2.3.1
+pretty_name: USDA Phytochemical & Ethnobotanical Database — Enriched v2.4.0
 size_categories:
   - 10K<n<100K
 configs:
@@ -53,6 +53,14 @@ dataset_info:
       dtype: string
     - name: patent_count_method
       dtype: string
+    - name: partner_cid
+      dtype: float64
+    - name: inchi_key
+      dtype: string
+    - name: iupac_verified
+      dtype: float64
+    - name: partner_match_method
+      dtype: string
   splits:
     - name: train
       num_bytes: 21261
@@ -70,12 +78,12 @@ dataset_info:
 If you use this dataset in your research, please cite:
 
 ```
-Wirth, A. (2026). USDA Phytochemical Database — Enriched v2.3.1 (Sample). Zenodo. https://doi.org/10.5281/zenodo.19265853
+Wirth, A. (2026). USDA Phytochemical Database — Enriched v2.4.0 (Sample). Zenodo. https://doi.org/10.5281/zenodo.19265853
 ```
 
 ---
 
-# USDA Phytochemical & Ethnobotanical Database — Enriched v2.3.1
+# USDA Phytochemical & Ethnobotanical Database — Enriched v2.4.0
 
 **The only phytochemical dataset combining USDA botanical records, PubMed citation counts, ClinicalTrials.gov study counts, ChEMBL bioactivity scores, USPTO patent density, and PubChem CID/SMILES — in production-ready JSON + Parquet.**
 
@@ -88,7 +96,7 @@ Wirth, A. (2026). USDA Phytochemical Database — Enriched v2.3.1 (Sample). Zeno
 
 [**Free 400-Row Sample ↓**](#quickstart) · [**Single €699 →**](https://buy.stripe.com/00w6oGgFh58v6Toeqsebu02?utm_source=github&utm_medium=readme&utm_campaign=launch_2026_03) · [**Team €1,349 →**](https://buy.stripe.com/dRm7sK9cP1Wj0v06Y0ebu03?utm_source=github&utm_medium=readme&utm_campaign=launch_2026_03) · [**Enterprise — Contact us →**](mailto:founder@ethno-api.com?subject=Enterprise%20License%20Inquiry)
 
-> **Enrichment status (March 2026):** All five enrichment layers (PubMed, ClinicalTrials.gov, ChEMBL, PatentsView, PubChem) are **complete and final**. v2.3.1 adds compound_type classification and patent_count_method transparency (PubChem CID coverage: 75.4%). The free 400-row sample contains real enrichment values.
+> **Enrichment status (March 2026):** All five enrichment layers (PubMed, ClinicalTrials.gov, ChEMBL, PatentsView, PubChem) are **complete and final**. v2.4.0 adds compound_type classification and patent_count_method transparency (PubChem CID coverage: 75.4%). The free 400-row sample contains real enrichment values.
 
 </div>
 
@@ -105,7 +113,7 @@ Wirth, A. (2026). USDA Phytochemical Database — Enriched v2.3.1 (Sample). Zeno
 
 ## Patent and Literature Signal Layer
 
-v2.3.1 includes compound-level patent and literature signals across 24,746 unique chemicals. Each compound carries a `patent_count_since_2020` (USPTO PatentsView) and `pubmed_mentions_2026` (NCBI E-utilities) field, enabling independent prioritization analysis.
+v2.4.0 includes compound-level patent and literature signals across 24,746 unique chemicals. Each compound carries a `patent_count_since_2020` (USPTO PatentsView) and `pubmed_mentions_2026` (NCBI E-utilities) field, enabling independent prioritization analysis.
 
 A new `compound_type` column classifies all entries as `discrete_phytochemical`, `substance_class`, `complex_mixture`, `inorganic_element`, or `generic_ambiguous`. A `patent_count_method` column documents the query methodology per compound (including known limitations for name-based queries on generic terms).
 
@@ -113,7 +121,7 @@ Full methodology is documented in `METHODOLOGY.md`. Known limitations are listed
 
 ---
 
-## Schema (v2.3.1)
+## Schema (v2.4.0)
 
 | Column | Type | Nulls | Description |
 |--------|------|-------|-------------|
@@ -126,9 +134,9 @@ Full methodology is documented in `METHODOLOGY.md`. Known limitations are listed
 | `chembl_bioactivity_count` | `int32` | 0% | ChEMBL documented bioactivity measurement count |
 | `patent_count_since_2020` | `int32` | ~0.9% | US patents since 2020-01-01 mentioning compound (USPTO PatentsView) |
 | `pubchem_cid` | `int64` | ~28.2% | PubChem Compound ID (CID) — resolved via PubChem PUG REST (March 2026) |
-| `canonical_smiles` | `string` | ~28.2% | Canonical SMILES notation — molecular structure from PubChem (75.4% of unique compounds resolved in v2.3/v2.3.1) |
-| `compound_type` | `string` | 0% | Classification: `discrete_phytochemical`, `substance_class`, `complex_mixture`, `inorganic_element`, `generic_ambiguous` — added in v2.3.1 |
-| `patent_count_method` | `string` | ~0.9% | Query methodology: `name_based_with_cid`, `name_based_no_cid`, `name_based_invalidated`, `NULL` — added in v2.3.1 |
+| `canonical_smiles` | `string` | ~28.2% | Canonical SMILES notation — molecular structure from PubChem (75.4% of unique compounds resolved in v2.4/v2.4.0) |
+| `compound_type` | `string` | 0% | Classification: `discrete_phytochemical`, `substance_class`, `complex_mixture`, `inorganic_element`, `generic_ambiguous` — added in v2.4.0 |
+| `patent_count_method` | `string` | ~0.9% | Query methodology: `name_based_with_cid`, `name_based_no_cid`, `name_based_invalidated`, `NULL` — added in v2.4.0 |
 
 ---
 
@@ -182,7 +190,7 @@ Download link delivered instantly after payment (valid 72h). See ethno-api.com.
 ```python
 import pyarrow.parquet as pq
 
-table = pq.read_table("ethno_dataset_2026_v2.3.1.parquet")
+table = pq.read_table("ethno_dataset_2026_v2.4.0.parquet")
 print(f"Schema: {table.schema}")
 print(f"Rows: {table.num_rows}  Memory: {table.nbytes / 1e6:.1f} MB")
 ```
@@ -222,7 +230,7 @@ print(f"Records: {len(df)} | Columns: {list(df.columns)}")
 df.head()
 ```
 
-> **Note:** The `split="train"` loads `ethno_sample_400.parquet` (400 rows, 12 columns).
+> **Note:** The `split="train"` loads `ethno_sample_400.parquet` (400 rows, 16 columns).
 > The full 76,907-row dataset is available at [ethno-api.com](https://ethno-api.com).
 
 ## Sample Record
@@ -242,11 +250,15 @@ Below is a real record from the dataset — QUERCETIN, one of the most-studied p
   "pubchem_cid": 5280343,
   "canonical_smiles": "C1=CC(=C(C=C1C2=C(C(=O)C3=C(C=C(C=C3O2)O)O)O)O)O",
   "compound_type": "discrete_phytochemical",
-  "patent_count_method": "name_based_with_cid"
+  "patent_count_method": "name_based_with_cid",
+  "partner_cid": null,
+  "inchi_key": null,
+  "iupac_verified": null,
+  "partner_match_method": null
 }
 ```
 
-All 76,907 records contain all 12 schema fields. The 4 enrichment columns are always non-null; `pubchem_cid` and `canonical_smiles` are filled for 75.4% of unique compounds (18,675 of 24,746 resolved via PubChem PUG REST in v2.3/v2.3.1); `compound_type` and `patent_count_method` are populated for all records; `application` (~50% null) and `dosage` (~87% null) reflect USDA source gaps. Unresolved compounds are phytochemical trivial names, mixture descriptions, or non-specific ethnobotanical terms not indexed in PubChem by name.
+All 76,907 records contain all 16 schema fields. The 4 enrichment columns are always non-null; `pubchem_cid` and `canonical_smiles` are filled for 75.4% of unique compounds (18,675 of 24,746 resolved via PubChem PUG REST in v2.4/v2.4.0); `compound_type` and `patent_count_method` are populated for all records; `application` (~50% null) and `dosage` (~87% null) reflect USDA source gaps. Unresolved compounds are phytochemical trivial names, mixture descriptions, or non-specific ethnobotanical terms not indexed in PubChem by name.
 The free 400-row sample contains real, final enrichment values across all five layers.
 
 ## File Manifest
@@ -256,8 +268,8 @@ The free 400-row sample contains real, final enrichment values across all five l
 | `ethno_sample_400.json` | 179 KB | JSON | Free (this repo) |
 | `ethno_sample_400.parquet` | 20 KB | Parquet | Free (this repo) |
 | `quickstart.ipynb` | 9 KB | Notebook | Free (this repo) |
-| `ethno_dataset_2026_v2.3.1.json` | ~35 MB | JSON | Included in all tiers |
-| `ethno_dataset_2026_v2.3.1.parquet` | ~1.3 MB | Parquet | Included in all tiers |
+| `ethno_dataset_2026_v2.4.0.json` | ~41 MB | JSON | Included in all tiers |
+| `ethno_dataset_2026_v2.4.0.parquet` | ~1.3 MB | Parquet | Included in all tiers |
 | `MANIFEST_v2.json` (SHA-256) | ~1 KB | JSON | Included in all tiers |
 | `duckdb_queries.sql` (20 Queries) | ~13 KB | SQL | Team + Enterprise |
 | `compound_priority_score.py` | ~5 KB | Python | Team + Enterprise |
@@ -296,10 +308,10 @@ Enrichment methodology is documented in [`METHODOLOGY.md`](METHODOLOGY.md). Sour
 | v2.0 | 76,907 | 8 columns (+ PubMed, ClinicalTrials, ChEMBL, Patents) | Deprecated |
 | v2.1 | 76,907 | 10 columns (+ PubChem CID, Canonical SMILES) | Superseded |
 | v2.2 | 76,907 | 10 columns (stereo-prefix CT normalization, corrected SMILES coverage) | Superseded |
-| v2.3 | 76,907 | 10 columns (CTS synonym enrichment — PubChem CID coverage 75.4%) | Superseded |
-| **v2.3.1** | **76,907** | **12 columns (+compound_type, +patent_count_method, forensic audit corrections)** | **Current** |
+| v2.4 | 76,907 | 10 columns (CTS synonym enrichment — PubChem CID coverage 75.4%) | Superseded |
+| **v2.4.0** | **76,907** | **16 columns (+compound_type, +patent_count_method, forensic audit corrections)** | **Current** |
 
-The free sample (`ethno_sample_400.json`) uses the v2.3.1 schema with final enrichment values across all five layers.
+The free sample (`ethno_sample_400.json`) uses the v2.4.0 schema with final enrichment values across all five layers.
 
 ## Data Attribution
 
@@ -333,14 +345,14 @@ Ethno-API is the deterministic answer to these pipeline requirements.
 > No VAT charged (German small business exemption, §19 UStG).
 
 ```bibtex
-@misc{ethno_api_v23_2026,
-  title     = {USDA Phytochemical \& Ethnobotanical Database --- Enriched v2.3.1},
+@misc{ethno_api_v24_2026,
+  title     = {USDA Phytochemical \& Ethnobotanical Database --- Enriched v2.4.0},
   author    = {Wirth, Alexander},
   year      = {2026},
   publisher = {Ethno-API},
   url       = {https://ethno-api.com},
   doi       = {10.5281/zenodo.19265853},
-  note      = {76,907 records, 24,746 unique chemicals, 2,313 plant species, 12-column schema with PubMed, ClinicalTrials, ChEMBL, PatentsView, PubChem CID/SMILES enrichment}
+  note      = {76,907 records, 24,746 unique chemicals, 2,313 plant species, 16-column schema with PubMed, ClinicalTrials, ChEMBL, PatentsView, PubChem CID/SMILES enrichment}
 }
 ```
 

llms.txt

@@ -4,7 +4,7 @@
 
 # PRODUCT
 > Ethno-API: USDA Phytochemical & Ethnobotanical 
-> Database — Enriched v2.3.1
+> Database — Enriched v2.4.0
 
 The only production-ready dataset combining USDA 
 Dr. Duke's phytochemical records with PubMed 
@@ -15,7 +15,7 @@ SMILES. 76,907 records, 24,746 unique compounds,
 2,313 plant species. JSON (35 MB) + Parquet 
 (1.3 MB). DOI: 10.5281/zenodo.19265853.
 
-# SCHEMA (v2.3.1, 12 columns)
+# SCHEMA (v2.4.0, 16 columns)
 - chemical: compound name (USDA Duke nomenclature)
 - plant_species: binomial Latin species name
 - application: traditional medicinal application
@@ -80,5 +80,12 @@ Full methodology: https://github.com/wirthal1990-tech/USDA-Phytochemical-Databas
 
 # CITATION
 Wirth, A. (2026). USDA Phytochemical & 
-Ethnobotanical Database — Enriched v2.3.1. Zenodo.
+Ethnobotanical Database — Enriched v2.4.0. Zenodo.
 https://doi.org/10.5281/zenodo.19265853
+
+# New in v2.4.0 — COCONUT/Partner DB Crossmatch
+partner_cid: FLOAT — PubChem CID from COCONUT/partner DB crossmatch (1,534 filled)
+inchi_key: TEXT — InChI Key from crossmatch (157 filled)
+iupac_verified: FLOAT — IUPAC-verified PubChem CID (459 filled)
+partner_match_method: TEXT — Matching method used in crossmatch
+Null-CID reduction: 19,150 → 17,616 (-8% effective, via partner_cid backfill)