(2S,4R,6R)-6-{[(3a′S,8′R,9′R,10′S,11′S,12′R,15′R,15a′S)-9′-{[(2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}-15′-ethyl-8′-methoxy-4′,6′,8′,10′,12′,15a′-hexamethyl-5′,13 ′-dioxo-4′,5′,6′,7′,8′,9′,10′,11′,12′,13′,15′,15a′-dodecahydro-3a′H-spiro[cycloprop-2-ene-1,3′-furo[2,3-c]oxacyclotetradecin]-11′-yl]oxy}-4-methoxy-2,4-dimethyltetrahydro-2H-pyran-3-yl benzoate (non-p referred name)