Nitrogen mustard alkylating agent and prodrug. Phosphoramide mustard (active metabolite) forms DNA cross-links leading to cell death. Inhibits aldehyde dehydrogenase 1 (ALDH1) through its degradation product acrolein. Chemotherapeutic for the treatment of breast cancer; regulates Bax and Bcl-2 expression when administered with etoposide (Cat. No. 1226) in breast cancer cell lines.