1	JKM	1-[(2s,3as,4s,6r,6ar)-2-hydroxy-6-(hydroxymethyl)-2-oxidotetrahydrofuro[3,4-D][1,3,2]dioxaphosphol-4-yl]pyrimidine-2,4( 1h,3h)-dione	1.000
2	UPT	1-[(2r,3ar,4r,6r,6ar)-2-hydroxy-6-(hydroxymethyl)-2-sulfidotetrahydrofuro[3,4-D][1,3,2]dioxaphosphol-4-yl]pyrimidine-2,4(1h,3h)-dione	0.905
3	U23	Uridine-5'-monophosphate-2',3'-cyclic phosphate	0.760
4	6SY	Uridine-3',5'-cyclic monophosphate	0.739
5	9K9	2-amino-9-[(2s,3ar,4r,6r,6ar)-2-hydroxy-6-(hydroxymethyl)-2-oxotetrahydro-2h-2lambda~5~-furo[3,4-D][1,3,2]dioxaphosphol-4-yl]-3,9-dihydro-6h-purin-6-one	0.720
6	38S	1-[(2r,5s)-5-(hydroxymethyl)tetrahydrofuran-2-yl]-5-methylpyrimidine-2,4(1h,3h)-dione	0.714
7	DUR	2'-deoxyuridine	0.714
8	THU	Tetrahydrodeoxyuridine	0.714