Lisdexamfetamine. Molecular model of the psychostimulant drug lisdexamfetamine (C15.H25.N3.O), also known as lisdexamphetamine. This chemical is a central nervous system stimulant. It acts as a prodrug to dextroamphetamine upon cleavage of the lysine portion of the molecule. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) and oxygen (red).