Xanthopterin monohydrate5979-01-134 % similar 4,5-Diamino-6-hydroxy-2-mercaptopyrimidine1004-76-833 % similar Guanine sulfate10333-92-333 % similar 2-Amino-6-chloro-4(1H)-pyrimidinone1194-21-432 % similar 2-Amino-6-methylpyrimidin-4-one3977-29-532 % similar Vicine152-93-232 % similar 4-Thioxo-1H-pyrimidine-2,6-diammonium sulphate56-08-632 % similar Biopterin22150-76-131 % similar 4,6-Difluoro-2-pyrimidinamine675-11-631 % similar