If I remember right, it is a hormone found in boars and elephants and supposedly a metabolite of DHEA.
5a-Androst-2-ene-17-one (Delta 2) looks to have the same structure as phera except it has a ketone at the 17th position. The manufacture claim this makes it a precursor to a non-methyl phera. So best case scenario is it will convert to a steroid that is similar to phera but without the 17 position methylation. Problem is, methylation makes a HUGE difference with regards to the anabolic effects of the compound. So to compare this to a "non methlyated phera" isnt exactly accurate as this would be waaay different than the anabolic effects you would get from phera.
For what its worth, PA had commented that 300mg of this would most likely be similar to 25-50mg of protodrol