2,4,10-Tri(2-furyl)-7,8-dimethyl-6-oxo-3,4,9,10-tetrahydropyrido[3',4':3,4]pyrrolo[1,2-a][1,3,5]triazine-6a,10a(2H,6H)-dicarbonitrile AIDS-152756 AIDS152756 NSC697703