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2-phenyl 4,4,5,5-tetramethylimidazoline-1-oxyl [Supplementary Concept]
partial structure given in first source; endothelium-derived relaxing factor antagonist
Date introduced: February 23, 1993
Imidazoles
Compounds containing 1,3-diazole, a five membered aromatic ring containing two nitrogen atoms separated by one of the carbons. Chemically reduced ones include IMIDAZOLINES and IMIDAZOLIDINES. Distinguish from 1,2-diazole (PYRAZOLES).
Heterocyclic Oxides
Oxides of a ring compound having atoms other than carbon in its ring.
Year introduced: 1975
Heterocyclic Compounds, 1-Ring
Organic compounds that contain a ring structure made up of carbon and one or more additional elements such as nitrogen and oxygen.
Year introduced: 1998
Heterocyclic Compounds
Cyclic compounds that include atoms other than carbon in their ring structure.
Cyclic N-Oxides
Heterocyclic compounds in which an oxygen is attached to a cyclic nitrogen.
Year introduced: 1968
Azoles
Five membered rings containing a NITROGEN atom.