Azithromycin EP Impurity D Catalogue A535204 CAS 612069-26-8 M.W 765.00 M.F C38H72N2O13 Specifications FAQs (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-14-(hydroxymethyl)-3,5,6,8,10,12-hexamethyl-1-oxa-6-azacyclopentadecan-15-one
