Trotaandropropionate, also known as ismeistanolone hydroxymethandrosterone, is a pharmaceutical intermediate, white or white like crystalline powder, can be reacted with 9, 11-dehydrogen-17a-methyl-testosterone as raw material, and lithium chloride N-chlorinated Chemicalbook succinimide reacted to produce 9A, 11-dichloro-17a-methyl-95 testosterone, which was further esterified with propionate to produce 9A, 11-dichloro-17a-methyl-95 testosterone propionate, namely drotaxionpropionate