[{"from": "human", "value": "Describe this molecule. [C][C][Branch2][Ring2][P][C][C][Branch1][#Branch2][C][=Branch1][C][=O][N][C][Ring1][=Branch1][=O][C][C][C][Branch2][Ring1][=Branch2][C][Branch1][P][C][C][C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][N][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][N][C][=C][C][=C][C][=C][Ring1][=Branch1].[NH4+1].[NH4+1]"}, {"from": "gpt", "value": "The molecule is carbetimer (carboxyimamidate) is a low molecular weight derivatized copolymer of ethylene and maleic anhydride.  It has demonstrated antitumor activity against several animal models.  It has calcium chelation activity but seems to inhibit growth of sensitive cells by disrupting nucleoside uptake and metabolism."}]