1	0KY	3-[(2r)-2-ethoxypropyl]-2-thioxo-1,2,3,9-tetrahydro-6h-purin-6-one	1.000
2	PVW	3-(2-methoxyethyl)-2-thioxo-1,2,3,7-tetrahydro-6h-purin-6-one	0.882
3	W4Y	1-{2-[(propan-2-yl)oxy]ethyl}-2-sulfanylidene-1,2,3,5-tetrahydro-4h-pyrrolo[3,2-D]pyrimidin-4-one	0.789