| heterocyclic ring |
a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon
출처: wordnet.princeton.edu/perl/webwn
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| heterocyclic ring |
a chemical ring that includes atoms of different elements.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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