8,9-Didehydro-9-deoxo-6-deoxy-6,9-epoxyerythromycin

11-(4-Dimethylamino-3-hydroxy-6-methyl-tetrahydro-pyran-2-yloxy)-5-ethyl-3,4-dihydroxy-9-(5-hydroxy-4-methoxy-4,6-dimethyl-tetrahydro-pyran-2-yloxy)-2,4,8,10,12,14-hexamethyl-6,15-dioxa-bicyclo[10.2.1]pentadec-1(14)-en-7-one; Erythromycin A Enol Ether; EM 523; (6R)-6-Deoxy-9-deoxo-6,9-epoxy-8,9-didehydroerythromycin; 6,9-Epoxy-8,9-didehydro-9-deoxo-6-deoxyerythromycin; 6-Deoxy-9-deoxo-8,9-didehydro-6,9-epoxyerythromycin; Erythromycin Impurity 5(Erythromycin EP Impurity E); 6ß,9-Epoxy-8,9-didehydro-9-deoxo-6-deoxyerythromycin;Erythromycin A Enol Ether