Erythromycin Ethyl Succinate - Impurity K

33442-56-7

(3R,4S,5S,6R,7R,9R,11R,12S,13R,14R)-4-[(2,6-Dideoxy-3-C-methyl-α-L-ribohexopyranosyl)oxy]-14-ethyl-7,12-dihydroxy-3,5,7,9,11,13-hexamethyl-6-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]oxacyclotetradecane-2,10-dione;(3R,4S,5S,6R,7R,9R,11R,12S,13R,14R)-4-(((2R,4R,5S,6S)-4,5-Dihydroxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-6-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-14-ethyl-7,12-dihydroxy-3,5,7,9,11,13-hexamethyloxacyclotetradecane-2,10-dione;