1	PNX	3,7-dimethyl-1-(5-oxohexyl)-3,7-dihydro-1h-purine-2,6-dione	1.000
2	POY	3-methyl-1-(5-oxohexyl)-7-propyl-3,7-dihydro-1h-purine-2,6-dione	0.909
3	CFF	Caffeine	0.700