Emtricitabine. Molecular model of the drug emtricitabine (C8.H10.F.N3.O3.S). This drug, sold under the brand name Emtriva, is a nucleoside reverse transcriptase inhibitor (NRTI) for the treatment of HIV infection in adults and children. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (dark blue), oxygen (red), sulfur (yellow) and fluorine (light blue).