[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][Branch1][#C][C][S][S][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a homocystine in which both chiral centres have L configuration. It is functionally related to a L-homocysteine. It is a tautomer of a L,L-homocystine zwitterion."}]