What is the supposed function of the unsaturation in the first ring of methandrostenolone? I can't find anything in the literature describing this modification, though the 17alpha alkylation and esterification are well described.
Testosterone
Methandienone with 17alpha alkylation and pi unsaturation in first ring
Testosterone

Methandienone with 17alpha alkylation and pi unsaturation in first ring

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