Source:http://linkedlifedata.com/resource/umls/id/C2754475
GO: The chemical reactions and pathways resulting in the breakdown of isoquinoline alkaloids, alkaloid compounds that contain bicyclic N-containing aromatic rings and are derived from a 3,4-dihydroxytyramine (dopamine) precursor that undergoes a Schiff base addition with aldehydes of different origin. [GOC:mah, http://www.life.uiuc.edu/ib/425/lecture32.html]