From Berberis boliviana, Berberis bumeliaefolia, Berberis laurina, and Berberis paucidentata, twenty-one isoquinoline alkaloids were isolated. B. laurina yielded a new compound, berberilaurine [1], a bisbenzyltetrahydroisoquinoline with two diarylether bridges in between C-7 to C-5 and C-l 1 to C-12. © 1989, American Chemical Society. All rights reserved.