(b) Endogenous** AAS when administered exogenously:   Androstenediol (androst-5-ene-3 β,17β-diol) ; androstenedione (androst-4-ene-3,17-dione) ; dihydrotestosterone (17β-hydroxy-5α -androstan-3-one) ; prasterone (dehydroepiandrosterone, DHEA) ; testosterone   and the following metabolites and isomers:   5α-androstane-3 α,17α-diol; 5 α-androstane-3 α,17β-diol; 5 α-androstane-3 β,17α-diol; 5α-androstane-3 β,17β-diol; androst-4-ene-3 α,17α-diol; androst-4-ene-3α ,17β-diol; androst-4-ene-3 β,17α-diol; androst-5-ene-3 α,17α-diol; androst-5-ene-3 α,17β-diol; androst-5-ene-3 β,17α-diol; 4-androstenediol (androst-4-ene-3 β,17β-diol) ; 5-androstenedione (androst-5-ene-3,17-dione) ; epi-dihydrotestosterone; epitestosterone; 3 α-hydroxy-5α -androstan-17-one; 3 β-hydroxy-5α -androstan-17-one; 19-norandrosterone; 19-noretiocholanolone.