542951 4-HC 4-hydroperoxycyclophosphamide 240 1048927 HCY 4-hydroxycyclophosphamide 14 3758259 4HCY 4-hydroxycyclophosphamide 8 2346170 4-HO-CP 4-hydroxycyclophosphamide 3 2942462 4-hydroxy-CP 4-hydroxycyclophosphamide 2 1047223 HCP 4-hydroxycyclophosphamide 1 2833550 HOCP 4-hydroxycyclophosphamide 1