[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an L-alpha-amino acid anion having methylselanylmethyl as the side-chain. It is a conjugate base of a Se-methyl-L-selenocysteine. It is an enantiomer of a Se-methyl-D-selenocysteinate."}, {"from": "gpt", "value": "[C][Se][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N]"}]