Versatile methods for synthesizing organic acid salts of quaternary berberine-type alkaloids as anti-ulcerative

Zhi-Hui Zhang1, Jing Li2, Hai-Jing Zhang1

  • 1a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China.

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