(1S,2S,3R,4S,7R,9S,10S,12R,15S)-9,12-bis[(2H3)methyloxidanyl]-15-{[(6S,7R)-7-hydroxy-2,2-dimethyl-4,8-dioxo-6-phenyl-5-aza-3-oxaoct-8-yl]oxy}-2-(benzoyloxy)-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.04,7.03,10]heptadec-13(14)-en-4-yl acetate