3(2H)-Benzothiazolepropanesulfonic acid, 2-[(2E)-4-(1,3-diethyltetrahydro-4,6-dioxo-2-thioxo-5(2H)-pyrimidinylidene)-2-butenylidene]-, (2E)- AIDS-165737 AIDS165737 S-104(*Triethylammonium salt*)