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An alkaloid from Hydrastis canadensis L., Berberidaceae. It is also found in many other plants. It is relatively toxic parenterally, but has been used orally for various parasitic and fungal infections and as antidiarrheal.

An alkaloid, C20H17NO4, from berberis, occurring in yellow needles or prisms of bitter taste; employed like berberis in doses of gr. 2-5 (0.13-0.3).

see Oxyacantha Galeni.