(2R,3R,4S,5R,8R,10R,11R,12S,13S,14R)-11-{[4-(dimethylamino)-3-hydroxy-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2-yl]oxy}-2-ethyl-4,10-dihydroxy-13-[(5-hydroxy-4-methoxy-4,6-dimethyl-3,4,5,6-tetrahydro-2H-pyran-2-yl)oxy]-3,5,6,8,10,12,14-heptamethyl-6-aza-1-oxacyclopentadecan-15-one