Synonyms: 3'-Des(diMethylaMino)-3'-keto AzithroMycin;(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-[[4,6-dideoxy-β-D-erythro-hexopyranos-3-ulos-1-yl]oxy]-13-[(2,6-dideoxy-3-C-Methyl-3-O-Methyl-α-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptaMe