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Isoquinolines
A group of compounds with the heterocyclic ring structure of benzo(c)pyridine. The ring structure is characteristic of the group of opium alkaloids such as papaverine. (From Stedman, 25th ed)
Year introduced: 1969
Benzylisoquinolines
ISOQUINOLINES with a benzyl substituent.
Year introduced: 2004
Tetrahydroisoquinolines
A group of ISOQUINOLINES in which the nitrogen containing ring is protonated. They derive from the non-enzymatic Pictet-Spengler condensation of CATECHOLAMINES with ALDEHYDES.