Side chain oxidation of ifosfamide in man.

Ifosfamide as well as its stable alkylating metabolites namely carboxy-Ifosfamide and two dechloroethylated compounds were determined in the urine of a patient with progredient lung carcinoma who had been treated with 6 g of the drug. Quantitative measurements were carried out using a colorimetric procedure which consists of TL-spectrophotometric determinations on sheets which had previously been sprayed with 4-pyridinaldehyde-2-benzothiazolylhydrazone. In the case investigated the Ifosfamide was found to have been converted largely into two dechloroethylated compounds (48%) and only a small portion of carboxy-Ifosfamide (2.