苏州西山岛产枇杷叶的药材品质分析

Analysis on medicinal quality of leaf of Eriobotrya japonica produced in Xishan Island of Suzhou

枇杷叶为枇杷〔Eriobotrya japonica （ Thunb.） Lindl.〕的干燥叶片，为常用中药材之一[1]。目前已从枇杷叶中分离得到三萜酸类、黄酮类及多酚类等多种有效成分[2-3]，其中，三萜酸类是枇杷叶的主要药效物质，具有抗炎、降血糖和抗病毒等活性，主要包括齐墩果酸、熊果酸、蔷薇酸和科罗索酸等成分[4]，目前已将齐墩果酸和熊果酸作为枇杷叶质量检测标准[1]。大量的分析结果[5-8]表明：不同产地、不同季节、落叶与生长叶和不同品种枇杷叶间的三萜酸类成分存在差异。

Qualitative analysis of leaf sample of Eriobotrya japonica （ Thunb.） Lindl. collected from Xishan Island of Suzhou in 2009 was conducted by thin layer chromatographic method, and contents of water, total ash, extracts, oleanolic acid and ursolic acid in leaf of E. japonica collected in 2006 and 2009 were determined. The results show that methanol extracts of leaf sample contains ursolic acid. Water content in leaf sample collected in 2006 and 2009 is 13. 99% and 12. 75%, total ash content is 11. 66% and 13. 35%, extract content is 12. 76% and 12. 60%, and total content of oleanolic acid and ursolic acid is 1. 517% and 1. 157%, respectively. It is suggested that content of medicinal effective components in leaf of E. japonica produced in Xishan Island is high.