Azithromycin Impurity R

Chemical Name: (1R,2R,3R,6R,7S,8S,9R,10R,12R,15R)-9-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-3-ethyl-2,10-dihydroxy-7-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-2,6,8,10,12,15-hexamethyl-4,16-dioxa-14-azabicyclo[11.2.1]hexadec-13-en-5-one

Synonym:  Erythromycin A 9,11-Imino Ether

Smile: C[C@@H]([C@@H]([C@H](C(O[C@@H]([C@]1(O)C)CC)=O)C)O[C@@](O[C@@H](C)[C@@H]2O)([H])C[C@@]2(C)OC)[C@@]([C@](O)(C[C@H](C3=N[C@H](C)[C@@]1([H])O3)C)C)([H])O[C@@](O[C@H](C)C[C@@H]4N(C)C)([H])[C@@H]4O