A chemical reaction that forms a cyclic structure within a molecule.
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(1R,2S)-2-((benzyloxy)methyl)cyclopent-3-en-1-yl methanesulfonate
ethyl 2-((4-bromo-N-(prop-2-ynyl)phenylsulfonamido)methyl)cycloprop-2-enecarboxylate
3-phenyl-tetrahydrofuran
