1	H35	N-(furan-2-ylmethyl)-7h-purin-6-amine	1.000
2	EMU	N-benzyl-9h-purin-6-amine	0.833
3	BFW	4-N-furfurylcytosine	0.765
4	QXC	N-[(pyridin-2-yl)methyl]-7h-pyrrolo[2,3-D]pyrimidin-4-amine	0.737