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Allopurinol315-30-0100 % similar 7-Deazahypoxanthine3680-71-542 % similar Quinazolinone491-36-139 % similar 5-Fluoropyrimidine-4,6-diol106615-61-637 % similar Hypoxanthine68-94-034 % similar 6-Iodo-4(3H)-quinazolinone16064-08-734 % similar 7-Fluoroquinazolin-4(3H)-one16499-57-334 % similar 3,6-Dihydro-7H-1,2,3-triazolo[4,5-d]pyrimidin-7-one2683-90-133 % similar 6-Hydroxy-7-methoxy-4(3H)-quinazolinone179688-52-931 % similar 1,5-Dihydro-1-phenyl-4H-pyrazolo(3,4-d)pyrimidin-4-one21314-17-031 % similar 6-Hydroxy-5-nitro-4(3H)-pyrimidinone2164-83-231 % similar