(12S,2R,4R,5R,6R,8R,11R,19R)-5-[(2S,4S,3R,6R)-4-(Dimethylamino)-3-hydroxy-6-methylperhydropyran-2-yloxy]-15,18-diaza-11-ethyl-4-methoxy-2,4,6,8,12,19-hexamethyl-10,13-dioxatricyclo[10.6.2.0<15,20