4-(2-Furyl)-8-(2-furylmethylene)-6-methyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-2-amine 4-(2-Furyl)-8-(2-furylmethylene)-6-methyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-2-ylamine AIDS-138567 AIDS138567 NSC645612