Azacitidine Impurity 7 Catalogue A206557 CAS 1415316-72-1 M.W 328.28 M.F C12H16N4O7 Specifications FAQs (2R,3R,4R,5R)-2-(4-amino-2-oxo-1,3,5-triazin-1(2H)-yl)-5-(hydroxyl methyl)tetrahydrofuran-3,4-diyl diacetate