Roxithromycin EP Impurity A

Chemical Name: (3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-dideoxy-3-C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]oxacyclotetradecane-2,10-dione (as per EP)

Smile: C[C@H]([C@@H](O[C@@]([H])([C@@H]1O)O[C@@H](C[C@@H]1N(C)C)C)[C@](C[C@@H](C)C([C@H](C)[C@H](C2(C)O)O)=O)(C)O)[C@H](O[C@@]([H])(CC3(OC)C)O[C@H]([C@@H]3O)C)[C@@H](C)C(O[C@@H]2CC)=O