tetrahydrogestrinone

i did a search but could find anything other than news reports of all the athletes popping up with positives(Google) and nothing on the ol’ T-mag forums
What you guys know about this?
when was it first made, by who, class I or II, effective or not, oral, injectable etc
i honestly couldn’t find a thing

From what I hear, it’s an androgen similar in structure to trenbolone, so it’s surely a 19-nor compound. I also heard it was 17aa since it’s oral. I’m going to wager it not only binds very strongly to the androgen receptor but it also exhibits excellent myotrophic effects. After all, it was designed to improve performance significantly and to pass drug tests. We all know how terrific trenbolone is at increasing strength…

cheers,
any links anyone?
(TEK oh man of many links)