[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a phosphate salt resulting from the reaction of equimolar amounts of tris and phosphoric acid. It has a role as a buffer. It contains a member of Htris."}, {"from": "gpt", "value": "[C][Branch1][O][C][Branch1][Ring1][C][O][Branch1][Ring1][C][O][N][O].[O][P][=Branch1][C][=O][Branch1][C][O][O]"}]