3-(2-{4-[1-(2-Methoxy-ethyl)-4,6-dioxo-2-thioxo-tetrahydro-pyrimidin-5-ylidene]-but-2-enylidene}-naphtho[2,1-d]thiazol-3-yl)-propane-1-sulfonic acid AIDS-165760 AIDS165760 S-162(*Triethylammonium salt*)