[{"from": "human", "value": "Describe this molecule. [C][C][O][C][=Branch1][C][=O][C@H1][Branch1][Branch1][C][C][S][C][N]"}, {"from": "gpt", "value": "The molecule is an L-methionine derivative that is the ester obtained by formal condensation of the carboxy group of L-methionine with ethanol. It has a role as a potassium channel blocker. It is an alpha-amino acid ester and a L-methionine derivative."}]