(4R,5S,6S,7R,9R,11E,13E,15R,16R)-15-({[(2R,3R,4R,5R,6R)-5-hydroxy-3,4-dimethoxy-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2-yl]oxy}methyl)-6-{[(2R,3R,4R,5S,6R)-5-{[(2S,4R,5S,6S)-4-hydroxy-4,6-dimethyl-5-[(3-methyl-1-oxobutyl)oxy]-3,4,5,6-tetrahydro-2H-pyran-2-yl]oxy}-4-(dimethylamino)-3-hydroxy-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2-yl]oxy}-16-ethyl-7-(formylmethyl)-5,9,13-trimethyl-2,10-dioxooxacyclohexadeca-11,13-dien-4-yl acetate (2R,3R)-2,3-dihydroxybutanedioic acid