173838-31-8 191114-48-4 Erythromycin, 3-de((2,6-dideoxy-3-C-methyl-3-O-methyl-alpha-L-ribo-hexopyranosyl)oxy)-11,12-dideoxy-6-O-methyl-3-oxo-12,11-(oxycarbonyl((4-(4-(3-pyridinyl)-1H-imidazol-1-yl)butyl)imino))- HMR 3647 HMR-3647 Ketek RU 66647 RU-66647 Telithromycin Telithromycin [INN:BAN]