in many mammalian species , testosterone is mainly metabolized to 5-alpha-reduced compounds ( e.g . 17-beta-hydroxy-5-alpha-androstan- 3-one , 5 alpha-dht and 3-alpha,17-beta-dihydroxy-5-alpha-androstane , 5-alpha,3-alpha-diol ) and , to a smaller extent , to 4-androstene-3,17-dione ( androstenedione ) , while in birds , androstenedione is the main testosterone metabolite and the conversion to the 5-alpha-reduced compounds is quantitatively negligible .
C0002854
androstane
C0039601
testosterone