Detection and mass spectrometric characterization of novel long-term dehydrochloromethyltestosterone metabolites in human urine

► New metabolites of dehydrochloromethyltestosterone identified in human urine. ► Metabolism is very complex and subject-dependent. ► Recommended target is 4-chloro-18-nor-17β-hydroxymethyl,17α-methyl-5β-androst-13-en-3α-ol. ► This metabolite is excreted longer than any other known metabolites.