[{"from": "human", "value": "What can you tell me about this molecule? [C][O][C][=Branch1][C][=O][C][=C][C][=Branch1][=Branch1][=N][C][=N][Ring1][=Branch1][N][=C][N][Ring1][Branch2]"}, {"from": "gpt", "value": "The molecule is a methyl ester that is purine bearing a methoxycarbonyl substituent at position 6. It is a member of purines and a methyl ester."}]