active metabolite of cyclophosphamide used in chemotherapy
4-Hydroxycyclophosphamide (4-HC) is an active metabolite of the chemotherapy drug cyclophosphamide. It is formed in the liver and is responsible for the drug's therapeutic effects, as well as some of its side effects. 4-HC works by interfering with the DNA of rapidly dividing cells, which makes it effective in treating certain cancers and autoimmune diseases.