(.alpha.r)-.gamma.-oxo-.alpha.-((3s,4r)-2-oxo-3-((4s)-2-oxo-4-phenyl-3-oxazolidinyl)-4-((1e)-2-phenylethenyl)-1-azetidinyl)-n-((1r)-1-phenylethyl)(1,4'-bipiperidine)-1'-butanamide
(.alpha.r)-.gamma.-oxo-.alpha.-((3s,4r)-2-oxo-3-((4s)-2-oxo-4-phenyl-3-oxazolidinyl)-4-((1e)-2-phenylethenyl)-1-azetidinyl)-n-((1r)-1-phenylethyl)(1,4'-bipiperidine)-1'-butanamide