3-Methoxy-1,3,5(10)-estratriene-17(R)-spiro-6'-(2'-(bis-(2-chloroethyl)amino)-2'-oxo-1'oxa-3aza-2'-phosphorane).
D000970:Antineoplastic Agents / Q000138:chemical synthesis*; D003520:Cyclophosphamide / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D004963:Estrenes / Q000138:chemical synthesis; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D013055:Spectrophotometry, Infrared; D013141:Spiro Compounds / Q000138:chemical synthesis
D000970:Antineoplastic Agents; D004963:Estrenes; D013141:Spiro Compounds; D003520:Cyclophosphamide