Synonyms: RU-66647;HMR-3647;Levviax;(3aS,4R,7R,9R,10R,11R,13R,15R,15aR)-4-Ethyl-11-methoxy-3a,7,9,11,13,15-hexamethyl-1-[4-[4-(3-pyridyl)imidazol-1-yl]butyl]-10-[3,4,6-trideoxy-3-(dimethylamino)-beta-D-xylo-hexopyranosyloxy]octahydro-2H-oxacyclotetradecino[4,3-d]oxazole-2,6,8,14(1H,7H,9H)-tetraone;(3aS,4R,7R,9R,10R,11R,13R,15R,15aR)-4-ethyl-11-methoxy-3a,7,9,11,13,15-hexamethyl-2,6,8,14-tetraoxo-1-[4-(4-pyridin-3-yl-1H-imidazol-1-yl)butyl]tetradecahydro-2H-oxacyclotetradecino[4,3-d][1,3]oxazol-10-yl 3,4,6-trideoxy-3-(dimethylamino)-beta-D-xylo-hexopyranoside