Search and retrieve chemical compound data from PubChem's PUG REST API (110M+ compounds). Use when the user needs compound properties, molecular structures, similarity searches, substructure searches, or bioactivity data. NOT for protein structures (use pdb-structure), NOT for drug-target interactions (use chembl-drug), NOT for gene-disease associations (use open-targets).
Query the PubChem PUG REST API to search over 110 million chemical compounds by name, CID, SMILES, InChI, or molecular formula. Retrieve molecular properties, 2D/3D structures, bioactivity data, and perform similarity or substructure searches.