8-(3-Chlorobenzylidene)-4-(3-chlorophenyl)-7,8-dihydro-5H-pyrano[4,3-d]pyrimidin-2-amine 8-(3-Chlorobenzylidene)-4-(3-chlorophenyl)-7,8-dihydro-5H-pyrano[4,3-d]pyrimidin-2-ylamine AIDS-150905 AIDS150905 NSC689282