Fenselau C, Kan M N, Billets S, Colvin M
Cancer Res. 1975 Jun;35(6):1453-7.
An active metabolite of cyclophosphamide, N,N-bis(2-chloroethyl)phosphorodiamidic acid, has been confirmed as a circulating and excreted metabolite in patients receiving the drug in therapy, by selected ion monitoring on a gas chromatograph mass spectrometer.