1	HMH	4-amino-5-hydroxymethyl-2-methylpyrimidine	1.000
2	ICP	2-methyl-5-methylene-5h-pyrimidin-4-ylideneamine	0.900
3	PYD	2,5-dimethyl-pyrimidin-4-ylamine	0.900
4	NSP	5-(aminomethyl)-2-methylpyrimidin-4-amine	0.818
5	8GF	2-methylpyrimidin-4-amine	0.800
6	TI5	5-methylpyrimidin-4-amine	0.800
7	1RT	4-amino-2-oxo-1,2-dihydropyrimidine-5-carboxylic acid	0.750
8	17E	5-methylcytosine	0.727
9	Q4H	4-azanylpyrimidine-5-carbonitrile	0.727
10	R8A	(2-aminopyridin-3-yl)methanol	0.727