[{"from": "human", "value": "Describe this molecule. [C][S+1][Branch1][N][C][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][C][C@@H1][C@H1][Branch2][Ring1][N][C@H1][Branch2][Ring1][#Branch1][C@@H1][Branch1][Ring2][O][Ring1][Branch1][N][C][=N][C][=C][Branch1][=Branch2][N][=C][N][=C][Ring1][=Branch1][Ring1][=Branch2][N][O][O]"}, {"from": "gpt", "value": "The molecule is a sulfonium betaine that is the conjugate base of S-adenosyl-4-methylthio-2-oxobutanoic acid, arising from deprotonation of the carboxy group. It has a role as a Saccharomyces cerevisiae metabolite. It is a sulfonium betaine and a carboxylic acid anion. It is functionally related to a 4-methylthio-2-oxobutanoate. It is a conjugate base of a S-adenosyl-4-methylthio-2-oxobutanoic acid."}]