SEARCH Articles Figures Tables Alkaloids terpenoid tetrahydroisoquinoline Alkaloids tetrahydroisoquinoline, simple Isoquinoline tetrahydroisoquinoline alkaloids ( Tetrahydroisoquinoline Tetrahydroisoquinoline alkaloids, and Tetrahydroisoquinoline alkaloids, biosynthesis Tetrahydroisoquinoline monoterpene alkaloids Tetrahydroisoquinolines Tyrosine simple tetrahydroisoquinoline alkaloids