[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an organoselenium compound comprising a methyl and hydroxy group covalently bound to a selenium atom. It has a role as a metabolite and an antioxidant. It is an organoselenium compound and a one-carbon compound."}, {"from": "gpt", "value": "[C][Se][O]"}]