1	UPE	2'-deoxy-5-[(2-phenylethyl)carbamoyl]uridine 5'-(dihydrogen phosphate)	1.000
2	UBI	2'-deoxy-5-[(2-methylpropyl)carbamoyl]uridine 5'-(dihydrogen phosphate)	0.758
3	MNU	(2r,4s)-1-[(4r)-3,4-dihydroxytetrahydrofuran-2-yl]-5-[(methylamino)methyl]-1,2,3,4-tetrahydropyrimidine-2,4-diol-5'-mon ophosphate	0.719
4	5HU	5-hydroxymethyluridine-2'-deoxy-5'-monophosphate	0.710
5	UFR	2'-deoxy-5-formyluridine 5'-(dihydrogen phosphate)	0.710
6	A1L3P	5-carboxymethylaminomethyluridine	0.706