(3aR,4S,7R,7aS)-3a-methyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione - 2,2'-[propane-2,2-diylbis(benzene-4,1-diyloxymethanediyl)]dioxirane (1:1)
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