[{"from": "human", "value": "Describe this molecule. [C][C][Branch1][C][C][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][S]"}, {"from": "gpt", "value": "The molecule is an optically active form of penicillamine having D-configuration. Pharmaceutical form (L-form is toxic) of chelating agent used to treat heavy metal poisoning. It has a role as a chelator, an antirheumatic drug, a drug allergen and a copper chelator. It is a penicillamine and a non-proteinogenic alpha-amino acid. It is an enantiomer of a L-penicillamine."}]