[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an L-alpha-amino acid zwitterion obtained by transfer of a proton from the carboxy to the amino group of L-Cys(IAN). It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a tautomer of a L-Cys(IAN)."}, {"from": "gpt", "value": "[C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch1][Branch1][=C][N][Ring1][=Branch1][C][Branch1][Ring1][C][#N][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]