(4R,5S,6S,7R,9R,10R,11E,13E,16R)-10-{[(2R,5S,6R)-5-(dimethylamino)-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2-yl]oxy}-6-{[(2S,3R,4S,5S,6R)-4-(dimethylamino)-3,5-dihydroxy-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2-yl]oxy}-7-(formylmethyl)-5-methoxy-9,16-dimethyl-2-oxooxacyclohexadeca-11,13-dien-4-yl acetate