141340-34-3 Erythromycin 9,10-didehydro-N-demethyl-9-deoxo-11,12-dideoxy-9,12-epoxy-11-oxo- N-Demethyl-9-deoxo-11,12-dideoxy-9,12-epoxy-11-oxo-9,10-didehydroerythromycin Sporeamicin C