1	PB4	N,N'-bis(4-fluoro-3-methylbenzyl)pyrimidine-4,6-dicarboxamide	1.000
2	PB3	N,N'-bis(3-methylbenzyl)pyrimidine-4,6-dicarboxamide	0.871
3	PB5	N,N'-bis(pyridin-3-ylmethyl)pyrimidine-4,6-dicarboxamide	0.750