1	FM1	2-hydroxymethyl-5-(7-methylamino-3h-pyrazolo[4,3-D]pyrimidin-3-yl)-tetrahydro-furan-3,4-diol	1.000
2	FMB	Formycin B	0.857
3	FMC	(1s)-1-(7-amino-1h-pyrazolo[4,3-D]pyrimidin-3-yl)-1,4-anhydro-D-ribitol	0.857
4	FM2	2-(7-amino-6-methyl-3h-pyrazolo[4,3-D]pyrimidin-3-yl)-5-hydroxymethyl-tetrahydro-furan-3,4-diol	0.818
5	9DI	9-deazainosine	0.773