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Hydroxyindoleacetic Acid
Year introduced: 1966(1964)
Indoles
Benzopyrroles with the nitrogen at the number one carbon adjacent to the benzyl portion, in contrast to ISOINDOLES which have the nitrogen away from the six-membered ring.
Indoleacetic Acids
Acetic acid derivatives of the heterocyclic compound indole. (Merck Index, 11th ed)
Year introduced: 1975
Heterocyclic Compounds, 2-Ring
A class of heterocyclic compounds that include a two-ring fused structure. Both aromatic and non-aromatic ring structures are included in this category.
Year introduced: 1998
Heterocyclic Compounds
Cyclic compounds that include atoms other than carbon in their ring structure.
Acids, Heterocyclic
A class of acids containing a ring structure in which at least one atom other than CARBON is incorporated.
Heterocyclic Compounds, Fused-Ring
Multiple ring heterocyclic compounds containing two or more rings that share two atoms and one bond in common.
Year introduced: 2017