(1S,3′S,3a′R,6′S)-6′-(2-Chlorophenyl)-3′-[(2R,3S)-1-(4-methoxyphenyl)-4-oxo-3-phenylazetidin-2-yl]-2-oxo-3′,3′a,4′,6′-tetrahydro-2H,2′H-spiro[acenaphthylene-1,1′-pyrrolo[1,2-c][1,3]thiazole]-2′,2′-dicarbonitrile