Xanthopterin monohydrate5979-01-133 % similar 2,4-Diamino-6-hydroxymethylpteridine945-24-433 % similar Guanine hydrochloride635-39-233 % similar Dihydrobiopterin6779-87-932 % similar 2,4-Diamino-6,7-diisopropylpteridine Phosphate84176-65-832 % similar Guanine sulfate10333-92-332 % similar 2,4-Diamino-6-(hydroxymethyl)pteridine hydrochloride73978-41-331 % similar 2-Amino-6-hydroxy-4(3H)-pyrimidinone56-09-730 % similar