411 REFERENCE · Wiktionary
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Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
IUPAC Commission of Nomenclature for Heterocyclic Compounds (1957) en
Suffix
en suffix
Indicating a saturated 5-ring heterocyclic compound with nitrogen
Derived terms
en
References
Hantzsch–Widman nomenclature