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4-Aminopyrimidine591-54-8100 % similar 4-Pyrimidinol51953-18-546 % similar 6-Methylpyrimidin-4-amine3435-28-743 % similar 2,5-Diaminopyridine4318-76-739 % similar 2-Thiocytosine333-49-337 % similar Cytosine71-30-737 % similar 1,3,5-Triazin-2-amine4122-04-736 % similar 3-Pyridazinamine5469-70-536 % similar 2,5-Diaminopyridine dihydrochloride26878-35-335 % similar 2-Amino-5-bromopyridine1072-97-534 % similar 2-Amino-5-chloropyridine1072-98-634 % similar 2-Amino-5-methylpyridine1603-41-434 % similar 2-Amino-5-iodopyridine20511-12-034 % similar 4-Bromoimidazole2302-25-233 % similar 2-O-Methylcytosine3289-47-233 % similar 4,5-Diaminopyrimidine13754-19-332 % similar 4-Amino-5-bromopyrimidine1439-10-732 % similar 5-Azabenzimidazole272-97-932 % similar 5-Phenyl-2-pyridinamine33421-40-832 % similar 2-Amino-4-methylpyridine695-34-132 % similar