Furazabol anabolic steroid molecule. . Molecular model of the synthetic anabolic steroid furazabol. It is derived from stanozolol or dihydrotestosterone, and has been used illegally by athletes to increase strength and stamina. The molecular formula is: C20.H30.N2.O2. Atoms (spheres) are colour-coded: carbon (light grey), hydrogen (white), nitrogen (blue), and oxygen (red).