1	DYZ	7-ethyl-3-(phenylmethyl)purine-2,6-dione	1.000
2	5OU	3-[(4-chlorophenyl)methyl]-7-ethyl-purine-2,6-dione	0.952
3	ZS0	3-(4-fluorobenzyl)-2-thioxo-1,2,3,7-tetrahydro-6h-purin-6-one	0.773
4	A4V	3-benzyladenine	0.762