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Medical Definition of Heterocyclic compounds with 4 or more rings
1. A class of organic compounds containing four or more ring structures, one of which is made up of more than one kind of atom, usually carbon plus another atom. The heterocycle may be either aromatic or nonaromatic. (12 Dec 1998)
Lexicographical Neighbors of Heterocyclic Compounds With 4 Or More Rings
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