1 FKV 3-(2,2,2-trifluoroethyl)-1-{(1s)-1-[4-(trifluoromethyl)phenyl]ethyl}-1h-pyrazolo[3,4-D]pyrimidine-4,6(5h,7h)-dione 1.000 2 FKJ 3-(hydroxymethyl)-1-{(1s)-1-[4-(trifluoromethyl)phenyl]ethyl}-1h-pyrazolo[3,4-D]pyrimidine-4,6(5h,7h)-dione 0.828 3 FKG 3-(hydroxymethyl)-6-methyl-1-{(1s)-1-[4-(trifluoromethyl)phenyl]ethyl}-1,5-dihydro-4h-pyrazolo[3,4-D]pyrimidin-4-one 0.767