[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an organic cation consisting of three methyl groups covalently bound to a central selenium atom. It has a role as a human xenobiotic metabolite. It is functionally related to a dimethylselenide."}, {"from": "gpt", "value": "[C][Se+1][Branch1][C][C][C]"}]