(10E)-10,11-Didehydro-11-deoxy-6-O-MethylerythroMycin;Clarithromycin Impurity N;10,11-Anhydro Clarithromycin;Oxacyclotetradecane ErythroMycin Derivative; (3R,4S,5S,6R,7R,9R,13S,14R,E)-;Clarithromycin EP Impurity N/(4S,5S,6R,9R,13S,14R,E)-6-(((2S,3S,4R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-14-ethyl-13-hydroxy-4-(((2R,4S,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-7-methoxy-3,5,7,9,11,;Clarithromycin EP Impurity N;(10E)-10,11-Didehydro-11-deoxy-6-O-methylerythromycin A