[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is the monocarboxylic acid anion obtained via deprotonation of the carboxy group of 5,6,7,8-tetrahydropterin-6-carboxylic acid; major species at pH 7.3."}, {"from": "gpt", "value": "[C][C][Branch2][Ring1][Ring1][N][C][=C][Branch1][Ring2][N][Ring1][=Branch1][N][=C][Branch1][=Branch1][N][C][Ring1][#Branch1][=O][N][C][=Branch1][C][=O][O-1]"}]