since high doses of ifosfamide , the structural isomer of cyclophosphamide , were made tolerable with mesna uroprotection , high-dose ifosfamide ( 5 to 10 g/m2 ) has replaced conventional-dose cyclophosphamide ( 900 to 1,500 mg/m2 ) in some combination chemotherapy regimens .
C0020823
ifosfamide
C0010583
cyclophosphamide