[{"from": "human", "value": "Describe this molecule. [C][C][=Branch2][Ring1][=N][=C][C][C][/C][=Branch2][Ring1][Branch1][=C][/C][C][/C][=Branch1][=C][=C][/C][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][/C][/C][C]"}, {"from": "gpt", "value": "The molecule is an amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of S-[(2E,6E)]-farnesyl-L-cysteine; major species at pH 7.3. It is an amino acid zwitterion and a S-polyprenyl-L-cysteine zwitterion. It is a tautomer of a S-[(2E,6E)-farnesyl]-L-cysteine."}]