[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a calcium channel blocker."}, {"from": "gpt", "value": "[C][C][O][C][=Branch1][C][=O][C][=C][Branch2][Ring1][P][N][C][=Branch2][Ring1][O][=C][Branch1][P][C][Ring1][=Branch1][C][=C][C][=C][C][=N][O][N][=C][Ring1][Branch1][Ring1][=Branch2][C][=Branch1][C][=O][O][C][C][C][C]"}]