[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a triol. It has a role as a buffer. It is a conjugate acid of a member of tris."}, {"from": "gpt", "value": "[C][Branch1][O][C][Branch1][Ring1][C][O][Branch1][Ring1][C][O][NH3+1][O]"}]