1 4W4 5-butyl-2-[(4-chloro-2-fluorobenzyl)amino]-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile 1.000 2 UTT 2-[[4-chloranyl-2,6-bis(fluoranyl)phenyl]methylamino]-7-oxidanylidene-5-propyl-4h-pyrazolo[1,5-a]pyrimidine-3-carbonitrile 0.926 3 775 2-[(4-chlorobenzyl)amino]-7-oxo-5-propyl-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carbonitrile 0.923 4 4VR 2-[(4-bromobenzyl)amino]-5-propyl[1,2,4]triazolo[1,5-a]pyrimidin-7(4h)-one 0.714