ERYTHROMYCIN, 3-DE[(2,6-DIDEOXY-3-C-METHYL-3-O-METHYL-A-L-RIBO-HEXOPYRANOSYL)OXY]-8,9,10,11-TETRADEHYDRO-9-DEOXO-11,12-DIDEOXY-9,12-EPOXY-6-O-METHYL-3-OXO-, (8E)- (9CI)