Tulathromycin Impurity B

Chemical Name: (2S,3S,6R,8R,9R,10S,11S,12R)-2-((2R,3R)-2,3-dihydroxypentan-2-yl)-9-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-8-hydroxy-11-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyl-5-((propylamino)methyl)tetrahydro-2H-pyran-2-yl)oxy)-3,6,8,10,12-pentamethyl-1-oxa-4-azacyclotridecan-13-one