8-(4-Methoxybenzylidene)-4-(4-methoxyphenyl)-6-methyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-2-amine 8-(4-Methoxybenzylidene)-4-(4-methoxyphenyl)-6-methyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-2-ylamine AIDS-138566 AIDS138566 NSC645611