Decladinose Roxithromycin (Roxithromycin Impurity B) (9E)-3-O-De(2,6-dideoxy-3-C-Methyl-3-O-Methyl-α-L-ribo-hexopyranosyl)erythroMycin 9-[O-[(2-Methoxyethoxy)Methyl]oxiMe] (9E)-3-O-de(2,6-dideoxy-3-C-Methyl-3-O-Methyl-α-L-ribo-hexopyranosyl)erythroMycin9-[O-[(2-Methoxyethoxy)Methyl]oxiMe] DecladinoseroxithroMycin RoxithroMycin IMpurity B (3R,4S,5S,6R,7R,9R,10E,11S,12R,13S,14R)-6-[(2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-14-ethyl-4,7,12,13-tetrahydroxy-10-(2-methoxyethoxymethoxyimino)-3,5,7,9,11,13-hexamethyl-oxa Roxithromycin Impurity 2(Roxithromycin EP Impurity B) Roxithromycin EP Impurity B/(3R,4S,5S,6R,7R,9R,11S,12R,13S,14R,E)-6-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-14-ethyl-4,7,12,13-tetrahydroxy-10-(((2-methoxyethoxy)methoxy)imino)-3,5,7,9,11,13-hexamethyloxacyclotetr