Dutasteride. Molecular model of the drug dutasteride (C27.H30.F6.N2.O2). This drug, sold under the brand name Avodart, is a triple 5alpha-reductase inhibitor that inhibits conversion of testosterone to dihydrotestosterone (DHT). It is used to treat benign prostatic hyperplasia. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (dark blue), oxygen (red) and fluorine (light blue).