Azacitidine Impurity 8 Catalogue A206558 CAS 1174733-90-4 M.W 286.24 M.F C10H14N4O Specifications FAQs ((2R,3S,4R,5R)-5-(4-amino-2-oxo-1,3,5-triazin-1(2H)-yl)-3,4- dihydroxytetrahydrofuran-2-yl)methyl acetate