[{"from": "human", "value": "Could you provide a description of this molecule? [C][Branch1][#C][C][S][S][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is a homocystine zwitterion in which both stereocentres have L configuration. It is a tautomer of a L,L-homocystine."}]