| Synonyms: | (2S ,4aR ,4 ′ R ,5 ′ S ,6 ′ S ,7 R ,8 S ,9 R ,10R ,12R ,14R ,15R ,16S )-7-ethyl-5 ′ ,8,9,14-tetrahydroxy-4′ -methoxy-4 ′ ,6 ′ ,8,10,12,14,16-heptamethyl-15-[[3,4,6-trideoxy-3-(dimethylamino)-β-D - xylo -hexopyranosyl]oxy]-hexadecahydrospiro[5H ,11H -1,3-dioxino[5,4-c]oxacyclotetradecin-2,2 ′ -pyrane]-5,11-dione;Dirithromycin EP impurity C;Dirithromycin EP Impurity C(Dirithromycin B);4,16-Dioxa-14-azabicyclo[11.3.1]heptadecan-5-one, 7-[(2,6-dideoxy-3-C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl)oxy]-3-ethyl-10-hydroxy-15-[(2-methoxyethoxy)methyl]-2,6,8,10,12,17-hexamethyl-9-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]-, (1R,2S,3R,6R,7S,8S,9R,10R,12R,13S,15R,17S)-;(9S)-9,11-[imino[(1RS)-2-(2-methoxyethoxy)ethylidene]oxy]-9-deoxo-11,12-dideoxyerythromycin |