1	5NU	5-nitrouracil	1.000
2	EJZ	5-nitro-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid	0.786
3	B57	2,6-diamino-5-nitropyrimidin-4(3h)-one	0.769
4	8PJ	3-nitropyridin-2-ol	0.750
5	DUC	Dihydropyrimidine-2,4(1h,3h)-dione	0.727
6	HPY	4-hydroxy-3,4-dihydro-1h-pyrimidin-2-one	0.727
7	OS0	4-oxidanyl-3,4-dihydro-1h-pyrimidin-2-one	0.727
8	URA	Uracil	0.727
9	680	6-methylamino-5-nitroisocytosine	0.714