[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][N][Branch2][Ring2][Ring1][C][C][N][Branch2][Ring1][#Branch1][C][C][N][Branch1][N][C][C][N][Ring1][N][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an azamacrocyle in which four nitrogen atoms at positions 1, 4, 7 and 10 of a twelve-membered ring are each substituted with a carboxymethyl group. It has a role as a chelator and a copper chelator. It derives from a hydride of a 1,4,7,10-tetraazacyclododecane."}]