1	2KA	2-amino-4-oxo-4,7-dihydro-3h-pyrrolo[2,3-D]pyrimidine-5-carboxylic acid	1.000
2	FDB	2-amino-5-methyl-3h-pyrrolo[2,3-D]pyrimidin-4(7h)-one	0.857
3	2K8	(6r)-2-amino-4-oxo-3,4,5,6,7,8-hexahydropteridine-6-carboxylic acid	0.812
4	HHS	6-carboxypterin	0.812
5	GD1	2-amino-5-[(z)-iminomethyl]-3,7-dihydro-4h-pyrrolo[2,3-D]pyrimidin-4-one	0.800
6	HNG	2-amino-5-(aminomethyl)-1,7-dihydro-4h-pyrrolo[2,3-D]pyrimidin-4-one	0.800
7	PQ0	2-amino-4-oxo-4,7-dihydro-3h-pyrrolo[2,3-D]pyrimidine-5-carbonitrile	0.800
8	PRF	7-deaza-7-aminomethyl-guanine	0.800
9	7DG	7-deazaguanine	0.786
10	QY8	2-amino-3h,4h,7h-pyrrolo[2,3-D]pyrimidin-4-one	0.786
11	B56	2-amino-8-methyl-4-oxo-3,4,7,8-tetrahydropteridine-6-carboxylic acid	0.765
12	6FP	2-amino-4-oxo-3,4-dihydropteridine-6-carbaldehyde	0.750
13	HHR	6-hydroxymethylpterin	0.750
14	JU2	2-amino-6-bromo-4-oxo-4,7-dihydro-3h-pyrrolo[2,3-D]pyrimidine-5-carbonitrile	0.750
15	PH2	2-amino-6-hydroxymethyl-7,8-dihydro-3h-pteridin-4-one	0.750
16	ZZZ	6-formyltetrahydropterin	0.750
17	7HX	7h-pyrrolo[2,3-D]pyrimidin-4-ol	0.714