[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Se][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is an alpha-amino acid compound having methylselanylmethyl as the side-chain. It has a role as an antineoplastic agent and a human metabolite. It is a member of selenocysteines and a non-proteinogenic alpha-amino acid. It is a conjugate base of a Se-methylselenocysteinium. It is a conjugate acid of a Se-methylselenocysteinate."}]