What is "tetrahydroisoquinoline"

n. (context organic compound English) A bicyclic heterocycle consisting of a benzene ring fused to one of aziridine; any derivative of this compound, many of which are pharmaceutical drugs.

Tetrahydroisoquinoline (TIQ) is an organic compound with the chemical formula CHN. Classified as a secondary amine, it is derived from isoquinoline by hydrogenation. It is a colorless viscous liquid that is miscible with most organic solvents. The tetrahydroisoquinoline skeleton is encountered in a number of bioactive compounds and drugs.