(17β)-17-(1-Oxopropoxy)androst-4-en-3-one; 17β-(Propionyloxy)androst-4-en-3-one; 17β-Hydroxy-4-androsten-3-one 17-propionate; 17β-Hydroxyandrost-4-en-3-one propionate; 17β-Hydroxyandrost-4-en-3-one-17β-propionate,(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl propionate,"Testosterone Propionate is a short acting oil-based injectable formulation of testosterone. Testosterone inhibits gonadotropin secretion from the pituitary gland and ablates estrogen production in the ovaries, thereby decreasing endogenous estrogen levels",Testosterone API