[{"from": "human", "value": "Describe this molecule. [C][C][O][C][=Branch1][C][=O][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][N].[C][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a methanesulfonate salt obtained by reaction of tricaine with one molar equivalent of methanesulfonic acid. Used as an anaesthetic for fish. It has a role as a general anaesthetic. It contains a tricaine(1+)."}]