Abstract Two new quinic acid derivatives (1, 2), together containing eighteen (3–20) known compounds, were isolated from the fruits of Chaenomeles speciosa. Spectroscopic methods and previous data retrieved from the literature were used to determine the chemical structures of the compounds. Among the compounds, quinic acid derivatives (3, 4, 6, 7), phenolic acid compounds (8, 10, 11) and catechin derivatives (18, 19, 20) were isolated for the first time from the family Chaenomeles. The chemotaxonomic significance of the compounds was also discussed.

中文翻译：

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木瓜果实中两种新的奎尼酸衍生物

摘要 从木瓜果实中分离出两种新的奎尼酸衍生物 (1, 2)，共包含十八 (3-20) 种已知化合物。使用光谱方法和从文献中检索到的先前数据来确定化合物的化学结构。其中，奎宁酸衍生物（3、4、6、7）、酚酸化合物（8、10、11）和儿茶素衍生物（18、19、20）为首次从木瓜属中分离得到。还讨论了化合物的化学分类学意义。