Synonyms: MegalomicinA (8CI); Oxacyclotetradecane, megalomicin A deriv.; Antibiotic XK 41C; Sch13430;[3R-(3R*,4S*,5S*,6R*,7R*,9R*,11R*,12R*,13S*,14R*)]-4-[(2,6-Dideoxy-3-C-methyl-a-L-ribo-hexopyranosyl)oxy]-14-ethyl-12,13-dihydroxy-3,5,7,9,11,13-hexamethyl-7-[[2,3,6-trideoxy-3-(dimethylamino)-a-L-ribo-hexopyranosyl]oxy]-6-[[3,4,6-trideoxy-3-(dimethylamino)-b-D-xylo-hexopyranosyl]oxy]oxacyclotetradecane-2,10-dione