[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an aziridine alkylating agent that cross-links with DNA, causing inhibition of DNA synthesis. It has been used as a chemosterilant. (NCI)"}, {"from": "gpt", "value": "[C][C][O][C][=Branch1][C][=O][N][P][=Branch1][C][=O][Branch1][=Branch1][N][C][C][Ring1][Ring1][N][C][C][Ring1][Ring1]"}]