(3aS,4R,7R,9R,10R,11S,13R,15R,15aR)-4-Ethyl- 3a,7,9,11,13,15-hexamethyl-11-[3-(3-quinolinyl)-2(E)-propenyloxy]- 10-[3,4,6-trideoxy-3-(dimethylamino)-b-D-xylohexopyranosyloxy] octahydro-2H-oxacyclotetradecino- [4,3-d]oxazole-2,6,8,14(1H,7H,9H)-tetraone