[{"from": "human", "value": "What can you tell me about this molecule? [C][N+1][Branch1][C][C][Branch1][C][C][C@@H1][Branch1][N][C][C][=C][N][=C][Branch1][Ring2][N][Ring1][Branch1][Se][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a histidine derivative that is N(alpha),N(alpha),N(alpha)-trimethyl-L-histidine substituted by a selenoxo group at position 2 on the imidazole ring. A selenium-containing antioxidant found in tuna blood. It has a role as a fungal metabolite, a marine metabolite and an antioxidant. It is an amino-acid betaine and a L-histidine derivative."}]