奎宁酸系金鸡纳树皮、咖啡的种子，苹果、桃子等的果实中含量很多的高等植物特有的脂环族有机酸，普遍分布于维管束植物，常与莽草酸共存。
已测出了忍冬叶中绿原酸和总咖啡酰奎宁酸的含量。
The contents of chlorogenic acid and total caffeoylquinic acid in Folium Lonicerae had been determined.
结果：测定了川渝6种忍冬叶中绿原酸和总咖啡酰奎宁酸的含量。
Results: The contents of chlorogenic acid and total caffeoylquinic acid in 6 Folium Lonicerae had been determined.
咖啡淡淡的酸味来自于此。往好的看，奎宁酸是合成抗感冒药达菲的起始原料化合物之一。
Gives coffee its slightly sour flavor. On the plus side, it's one of the starter chemicals in the formulation of Tamiflu.
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