Erythromycin EP Impurity F

Erythromycin impurity F|Pseudoerythromycin A Enol Ether|Pseudoerythromycin A Enol Ether ; (2R,3R,6R,7S,8S,9R,10R)-7-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-?-L-ribo-hexopyranosyl)oxy]-3-[(1R,2R)-1,2-dihydroxy-1-methylbutyl]-2,6,8,10,12-pentamethyl-9-[[3,4,6-t