Azithromycin EP Impurity B

Chemical Name: (2R,3R,4R,5R,8R,10R,11R,12R,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-a-L-ribo-hexopyranosyl)oxy]-2-ethyl-4,10-dihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-ß-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one

Synonym: 3-Deoxyazithromycin ; 3-Deshydroxy Azithromycin ; Azithromycin B;