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