(S)-N-((3R.4S.5S)-1-((S)-2-((1R.2R)-3-(((1S.2R)-1-hydroxy-1-phenylpropan-2-yl)amino)-1-methoxy-2-methyl-3-oxopropyl)pyrrolidin-1-yl)-3-methoxy-5-methyl-1-oxoheptan-4-yl)-N.3-dimethyl-2-((S)-3-methyl-2-(methylamino)butanamido)butanamide