a reaction in which two carbon-carbon double bonds are cleaved and reformed to create a cyclic compound.
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2(5H)-Furanone, 4-methyl-5-[(phenylmethoxy)methyl]-, (S)-
N-[(2R)-2-benzyl-3-butenoyl]-(1S)-2,10-camphorsultam
(2R,3S)-3-Benzenesulfonyl-2-phenyl-1,2,3,6-tetrahydro-pyridine
3,3-diallyldihydrofuran-2,4-dione
