灯盏花中新的酚酸类化合物的结构及活性研究

STUDY ON THE STRUCTURE AND ACTIVITY OF NEW PHENOLIC ACID COMPOUNDS FROM ERIGERON BREVISCAPUS

摘要: 目的研究中药灯盏花［Erigeron breviscapus (Vant.)Hand-Mazz］的心血管活性成分。方法用各种色谱技术进行分离，用IR，UV，MS，¹HNMR，¹³CNMR，2DNMR光谱鉴定他们的结构。以乳酸脱氢酶(LDH)释放量为指标测定BCMEC(bovinecerebralmicrovascularendothelialcell)损伤，比色法测定药物体外抗氧化和抗活性氧能力。结果从灯盏花中分离得到2个化合物，分别鉴定化合物的结构为：1-O-甲基-3,5-O-双咖啡酰基奎宁酸甲酯(III)和5-O-咖啡酰基奎宁酸丁酯(IV)。结论化合物III，IV为新的酚酸类化合物，化合物III对LPC引起的BCMEC损伤有明显的保护作用。

Abstract: AIM　To isolate and identify the active constituents of Erigeron brevisapus (Vant.) Hand. -Mazz. METHODS　The chemical constituents were isolated by silica gel column chromatography and two new compounds were obtained. Their structures were elucidated by IR, MS, ¹HNMR, ¹³CNMR, DEPT and 2DNMR. The injury of BCMEC (bovine cerebral microvascular endothelial cell) was determined by lactic dehydrogenase (LDH), the ability of the drugs anti-oxidation and scavenging oxidation of free radical was measured by colorimetric method. RESULTS　Two new compounds have been identified as 1-O-methyl-3, 5-O-dicaffeoyl quinic acid methyl ester (III) and 5-O-caffeoyl quinic acid butyl ester (IV). CONCLUSION Compounds III and IV are new compounds. Compound III can protect BCMEC injury by LPC.