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A pair of new enantiomeric isoquinoline alkaloids, (+)- and (−)-5-hydroxyl-8-oxyberberine (1), along with nine known analogs (2–10) were isolated from the rhizoma of Coptis chinensis. Their structures with absolute configurations were elucidated on the basis of spectroscopic methods, X-ray diffraction analysis, and quantum chemical calculation. The antibacterial activities of 1–10 were also evaluated...
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