[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a platinum coordination entity with cis square-planar geometry in which platinum(II) is coordinated to two ammonia ligands and a bidentate cyclobutane-1,1-dicarboxylate ligand. It has a role as a mutagen and an antineoplastic agent. It contains a cyclobutane-1,1-dicarboxylate(2-)."}, {"from": "gpt", "value": "[C][C][C][Branch1][Ring2][C][Ring1][Ring2][Branch1][=Branch1][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O].[N].[N].[Pt+2]"}]