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本文报道了中药复方口腔溃疡膜的制备方法及方中起主要治疗作用药物青黛、儿茶、黄连的薄层色谱研究，方法简便，结果准确
This article reported on the preparation method of traditional Chinese medicine compound oral ulcer film and the thin layer chromatographic studies of the main therapeutic drugs Fang Qingqi, catechu, and Coptis chinensis. The method is simple and the result is accurate.