RRAdam said:
Chemically speaking its actually methylated masteron - its not real close to anadrol at all. its pretty much by itself as far as effects go. decent strength, good anabolic - terrible on lipids, and hard on the liver.
my badd heres more info
Chemistry
Superdrol (methasteron) is definitely not a prohormone: it is a very active form of a designer supplement. Superdrol gets its name from the fact that it is a super-saturated, or 2-reduced, form of Anadrol. Anadrol has a =C-OH at the 2nd position, and if this is totally saturated (reduced) with hydrogen, it gives -CH3. Another way to describe it is that it is a 2a-17a-dimethyl of drostanolone (Masteron). Masteron has a single methyl group at the 2nd position. Superdrol is a modification of this structure by adding another methyl group at the 17th position, like M1T or M-Dien. However you may wish to look at it, it is by this simple-looking transformation that Superdrol comes to occupy the sweet spot between the chemical natures of Anadrol and Masteron. Since it is already reduced at the 5th position, it cannot make estrogen. Progesterone is not an issue: perhaps 0.1% can aromatize, in theory. In fact, this compound should not have any major metabolites at all. Maybe a few hydroxylated adrenal metabolites, but only traces. It is basically excreted unchanged as the conjugated glucuronate. The extra electron density at the 2 makes Superdrol 2-3x as anabolic (mg for mg) than Anadrol. To borrow from the language of genetics, Superdrol is a fine example of hybrid vigor: it has only the best attributes of each, and none of the worst. This is a supplement designed to have it all.
Anadrol/oxymetholone 17ß-hydroxy-2-hydroxymethylene-17a-methyl-5a-androstan-3-one
Superdrol/methasteron 2a,17a-Dimethyl-17ß-hydroxy-5a-androstan-3-one
Masteron/drostanolone 2a-methyl-17ß -hydroxy-5a-androstan-3-one
Proviron/mesterolone 1a-methyl-17ß -hydroxy-5a-androstan-3-one