A cycloaddition product of a chiral maleimide: 4-{(3a<i>S</i>*,6a<i>S</i>*)-4,6-dioxo-1-phenyl-5-[(1<i>R</i>)-1-phenylethyl]-1,3a,4,5,6,6a-hexahydropyrrolo[3,4-<i>c</i>]pyrazol-3-yl}phenyl acetate
Acta crystallographica. Section E