[{"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 a beta dimethyl analog of the amino acid cysteine.  As a degradation product of penicillin antibiotics, penicillamine chelates with heavy metals and increases their urinary excretion.  Possessing antineoplastic properties, penicillamine induces apoptosis by a p53-mediated mechanism and inhibits angiogenesis by chelating with copper, a cofactor for angiogenesis. (NCI04)"}]