based on the hypothesis of a relationship between the concentration of trace amines like tetrahydroisoquinolines ( tiq 's ) and beta-carbolines ( bc 's ) in the brain and an increased voluntary ingestion of ethanol , the concentrations of ethanol , acetaldehyde and harman ( a beta-carboline ) were examined in a group of 20 alcoholics .
C0006104
brain
C0086045
concentrations