SEARCH Articles Figures Tables 2-Amino- pteridin-4,7-dione 2-Amino-6- pteridin-4-one Covalent hydration—continued of pteridines, amino Pteridin Pteridine Pteridine , 2-amino-4-hydroxy Pteridine 2-amino-4,7-dihydroxy Pteridine-4,6,7-trione, 2-amino Pteridine-4,6-dione, 2-amino Pteridines Pteridines, 2-amino-, basicity Pteridines, amino-, tautomerism Ultraviolet spectra, covalent hydration of pteridines, 2-amino