Tetrahydroisoquinolines

**Definition:** 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.

**Tree numbers:** - D03.633.100.531.820

**Synonyms:** - Tetrahydro-Isoquinoline - 1,2,3,4-Tetrahydroisoquinolines - Tetrahydro-Isoquinolines