in avian species , testosterone is also converted to 5-beta-reduced steroids ( mainly 17-beta-hydroxy-5-beta-androstan-3-one , 5-beta-dht and 3-alpha,17-beta-dihydroxy-5-beta-androstane , 5-beta,3-alpha-diol ) , and there is also evidence that in these species testosterone metabolism in the central structures may be influenced by the photoperiod .
C0038317
steroids
C0002854
androstane