Some copy and paste of things I found interesting:
Anatrofin (stenbolone acetate) is an injectable anabolic steroid that was developed in the 1960's in Germany. As a matter of fact, steroid guru Dan Duchaine considered anatrofin as one of his favorite steroids, and has written that if he had to pick one compound to run for the rest of his life, he would choose anatrofin
Anatrofin is derived from dihydrotestosterone (DHT) on a 1-testosterone framework with the addition of a 2-methyl group. Compared to testosterone, it is three times as anabolic with only a slightly higher androgenic effect.
From a structural standpoint, you could argue that anatrofin is similar to primobolan, with the only difference that primo has a 1-methyl group and not 2. This alteration is also seen if we compare masteron to proviron - both are very similar, but one is an oral and the other one is an injectable. Nevertheless, in this particular comparison, oddly enough, both compounds are injectables. Hence, the change might have more to do with the Germans' desire to come up with their own unique version of an anemia drug with very low side effects. No matter the reason, anatrofin was extremely popular in Europe among pro bodybuilders, who used it as a pre-contest agent because of its properties.
"Duchaine characterized stenbolone as a milder Anadrol. I am not sure I agree since it doesn't cause the weight gain and bloat of anadrol and is likely not a strong inhibitor of 11-beta hydroxylase. It is basically the 1-dehydro derivative of masteron and is metabolized to some degree to dromostanolone. It builds up red blood cells but most androgens do so nothing too suprising there. I have never used it but it would probably be very similar to masteron but slightly less androgenic and a little more anabolic -- used alone, you probably wouldn't nptice much difference from masteron. "