[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][=C][=C][C][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C]"}, {"from": "gpt", "value": "The molecule is a prenylcysteine where the prenyl moiety is attached to the side-chain sulfur atom of L-cysteine. It is a prenylcysteine, a L-cysteine thioether and a S-hydrocarbyl-L-cysteine. It is a tautomer of a S-prenyl-L-cysteine zwitterion."}]