143313-36-4 9,10-Didehydro-3''-O-demethyl-9-deoxo-11,12-dideoxy-9,12-epoxy-11-oxoerythromycin Erythromycin, 9,10-didehydro-3''-O-demethyl-9-deoxo-11,12-dideoxy-9,12-epoxy-11-oxo- Sporeamicin B