5,6-Diamino-1-methyluracil6972-82-3100 % similar 5,6-Diamino-1,3-dimethyluracil5440-00-643 % similar 6-Amino-3-methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione21236-97-541 % similar 8-Bromo-3-methyl-3,7-dihydro-1H-purine-2,6-dione93703-24-339 % similar 3-Methyl-6-methylaminouracil5759-63-733 % similar