a type of chemical reaction in which a cyclic compound is formed by the closure of a ring within a larger molecule
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(E)-N-benzylidene-1-phenylmethanamine
2-methylidene-1-(3-oxopropyl)-1-phenyl-1-silacyclohexane
cis-1-Methoxy-2-methylcyclopentane
(2S,3aS,4R,7S,7aR)-3a,4,7,7a-tetrahydro-2-(4-methoxyphenyl)-7-methyl-4,7-ethano-1,3-benzodioxol-8-one