Methandrostenolone: Metabolism in the rabbit

Abstract
Methandrostenolone and the fully reduced metabolites 17α-methyl-5α-androstane-3β, 17β-diol and 17α-methyl-5β-androstane-3α, 17β-diol, the partially reduced and hydroxylated metabolites 16α, 17β-dihydroxy-17α-methyl-5β-androst-1-en-3-one and 16β,17β-dihy-droxy-17α-methyl-5β-androst-1-en-3-one, the monohydroxylated metabolites 6β, 17β-dihydroxy-17α-methyl-1,4-androstadien-3-one and 16β, 17β-dihydroxy-17α-methyl-1,4-androstadien-3-one, and the dihydroxylated metabolite 6β,16β, 17β-trihydroxy-17β-trihydroxy-17α-methyl-l,4-androstadien-3-one have been isolated and identified in the urine of rabbits orally dosed with methandrostenolone. C-16 Hydroxylated and dihydroxylated metabolites have not been previously reported from methandrostenolone. No evidence for epimerization at the C-17 position was observed in the rabbit.