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What is 2a, 17a-methyl-5a-androst-3-one, 17b-ol

I've read in Vida this:

* 2a-methyl: This substitution diminishes the androgenic activity and increases the anabolic of the steroid.

* 17a-methyl: increases oral availability, and usually, increases the Relative Binding Affinity with the androgenic receptors, increasing androgenic activity (but a 17a-methyl added to a 17b-hydroxy-5a-reduced compound does the opposite effect) and slightly diminishes aromatization.
 
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