中文摘要：

目的：初步鉴定兰考泡桐花中的化学成分,为该植物的药效物质基础研究提供数据支持。方法：运用液相色谱与四级杆飞行时间质谱联用技术（LC/QTOF-MS/MS）,以0.1%甲酸水（A）-乙腈（B）为流动相,梯度洗脱,在正离子模式下分析。结果：本研究从兰考泡桐花中共鉴定出12个化合物,其中通过与标准品的保留时间和化合物的特征碎片的比对,准确鉴定出5个化合物,分别为芦丁、野漆树苷、木犀草素、芹菜素和熊果酸。另外,通过标准品总结出的裂解规律及相关文献报道,初步鉴定出7个黄酮类成分。结论：本研究基于LC-QTOF/MS的方法对兰考泡桐花所含化学成分进行了表征,为泡桐属的同类植物的物质基础研究提供了有益参考。

英文摘要：

Objective： To identify the compounds in Paulownia elongata flower preliminarily and provide data to support the study on the effective material basis of this herb. Methods： Liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry（ LC / ESI-QTOF-MS / MS） was performed in the positive mode to analyze the compounds in the extracts of Paulownia elongata flower. The mobile phase consisted of water with0. 1% formic acid（ A） and acetonitrile（ B） using a gradient elution. Results： 12 compounds（ 11 flavonoids and 1 ursolic acid） were selectively identified in Paulownia elongata flower. Five compounds were unambiguously identified by comparing with the reference compounds and 7 compounds were tentatively identified or deduced according to their MS /MS data. Conclusion： Logical fragmentation pathways for flavonoids and ursolic acid have been proposed and are useful for the identification of these types of compounds in paulownia plants especially in the case of no chemical reference compounds.