(1R,1'S,5R,9R)-N-benzyl-N-{4-[(3,3-dimethoxypropyl)(toluene-4-sulfonyl)amino]butyl}-2-[3-oxo-1-((1'-phenylmethoxy)hexyl)-1,5,6,8a-tetrahydrooxazolo[3,4-a]pyridin-5-yl]acetamide