- m eth yl ated ▁derivative ▁of ▁ep iti ost an ol , ▁an ▁A AS ▁and ▁anti estro gen ▁which ▁was ▁formerly ▁used ▁in ▁the ▁treatment ▁of ▁breast ▁cancer ▁in ▁Japan . ▁Similarly ▁to ▁me p iti ost ane , ▁m eth yle p iti ost an ol ▁is ▁an ▁or ally ▁active ▁variant ▁of ▁ep iti ost an ol . ▁Due ▁to ▁its ▁C 1 7 α ▁m eth yl ▁group , ▁the ▁drug ▁is ▁considered ▁to ▁have ▁a ▁high ▁potential ▁for ▁he pat ot ox icity . ▁ ▁M eth yle p iti ost an ol ▁sur fac ed ▁on ▁the ▁internet ▁as ▁a ▁novel ▁designer ▁ster oid ▁in ▁di et ary ▁supp lement s ▁around ▁ 2 0 0 9 . ▁It ▁was ▁identified ▁in ▁ 2 0 1 5 ▁in ▁over ▁ 3 0 ▁products ▁sold ▁online ▁that ▁listed ▁it ▁as ▁an ▁ing red ient ▁on ▁their ▁product ▁label . ▁As ▁of ▁ 2 0 1 5 , ▁the ▁drug ▁is ▁reported ly ▁not ▁a ▁controlled ▁subst ance . ▁However , ▁it ▁may ▁deg rade ▁in ▁some ▁product ▁containers ▁into ▁des ox ym eth yl test oster one ▁( D MT ; ▁ 3 - des ox y - 1 7 α - m eth yl - δ 2 - D HT ), ▁which , ▁in ▁contrast , ▁is ▁a ▁controlled ▁subst ance . ▁Moreover , ▁m eth yle p iti ost an ol ▁has ▁been ▁reported ▁to ▁be ▁a ▁prod rug ▁of ▁D MT . ▁ ▁Chem