Update README.md

README.md

@@ -3,4 +3,20 @@ license: apache-2.0
 datasets:
 - reactiongraph/ReactionGraph
 pipeline_tag: graph-ml
----
+---
+## Reaction Graph Checkpoints
+Place the contents of this folder under the `checkpoints` folder.
+
+Here is an example of the directory structure:
+```
+Reaction-Graph/
+├── analysts
+├── checkpoints/
+│   └── reaction_graph/
+│       ├── hte
+│       ├── uspto_condition
+│       ├── uspto_tpl
+│       └── uspto_yield
+├── dataloaders
+└── ......
+```