(4R,5S,6S,7R,9R,11E,13E,15R,16R)-6-(((3S,4S,5S,6S)-4-(dimethylamino)-3,5-dihydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-16-ethyl-4-hydroxy-7-(2-hydroxyethyl)-15-(hydroxymethyl)-5,9,13-trimethyloxacyc