2b) EAA endógenos** cuando se administra n por vía externa:  Androstendiol (androst-5-en-3 β,17β-diol) ; androstendiona (androst-4-en-3,17-diona) ; dihidrotestosterona (17β-hidroxi-5 α-androstan-3-ona) ; prasterona (dehidroepiandrosterona, DHEA) ; testosterona  y los siguientes metabolitos e isómeros:  5α-androstan-3 α,17α-diol; 5 α-androstan-3 α,17β-diol; 5 α-androstan-3 β,17α-diol; 5α-androstan-3 β,17β-diol; androst-4-en-3 α,17α-diol; androst-4-en-3 α,17β-diol; androst-4-en-3β,17α-diol; androst-5-en-3 α,17α-diol; androst-5-en-3 α,17β-diol; androst-5-en-3β,17α-diol; 4-androstendiol (androst-4-en-3β ,17β-diol) ; 5-androstendiona (androst-5-en-3,17-diona) ; epi-dihidrotestosterona; epitestosterona; 3 α-hidroxi-5 α-androstan-17-ona; 3β-hidroxi-5 α-androstan-17-ona; 19-norandrosterona; 19-noretiocolanolona.