127955-44-6

ERYTHROMYCIN IMPURITY L Erythromycin EP Impurity L N-Formyl Erythromycin A (&gt N-Formyl Erythromycin A (>90%) Erythromycin, N-demethyl-N-formyl- 3''''-N-demethyl-3''''-N-formyl erythromycin A Erythromycin EP Impurity L (N-Formyl Erythromycin A) Erythromycin Impurity 12(Erythromycin EP Impurity L) Erythromycin EP Impurity L/N-((2S,3R,4S,6R)-2-(((3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-14-ethyl-7,12,13-trihydroxy-4-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,7,9,11,13-hexamethyl-2,10-dioxooxacyclotetradecan-6-yl)oxy)