Clarithromycin EP Impurity M

Chemical Name: (3R,4S,5S,6R,7R,9R,11S,12R,13S,14R,E)-14-ethyl-12,13-dihydroxy-4-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-6-(((2S,3R,4S,6R)-3-hydroxy-6-methyl-4-(methylamino)tetrahydro-2H-pyran-2-yl)oxy)-10-(hydroxyimino)-7-methoxy-3,5,7,9,11,13-hexamethyloxacyclotetradecan-2-one ; 3″-N-demethyl-6-O-methylerythromycin A (E)-9-oxime,