8H-Pyrimido[4,5-e][1,2,4]triazolo[1,2-a][1,2,4]triazine-1,3,8,10(2H,4H,9H)-tetrone, 6-[(4-chlorophenyl)amino]-9-(4-ethoxyphenyl)-2,4-dimethyl- AIDS-029438 AIDS029438 NSC681100