131418-65-0 9,10-Didehydro-9-deoxo-11,12-dideoxy-9,12-epoxy-11-oxoerythromycin Erythromycin, 9,10-didehydro-9-deoxo-11,12-dideoxy-9,12-epoxy-11-oxo- L53-18 A SRM-A Sporeamicin A