摘要
采用半制备高效液相法从枇杷叶中分离了2α-羟基齐墩果酸与2α-羟基熊果酸,通过UV、电子电离质谱(EI-MS)、NMR、IR对其结构进行了确认。并对其电子电离质谱正离子(EI-MS(+))裂解途径进行了研究,通过比较不同离子碎片的稳定性,提出了利用EI-MS中m/z248、203和133这3个特征离子碎片丰度差异鉴别这两种物质的方法。
2α-Hydroxy-oleanolic acid and 2α-hydroxy-ursolic acid were isolated from Eriobotrya japonica leaves by preparative reversed-phase high performance liquid chromatography.The structure was confirmed by using UV,EI-MS,NMR and IR.The possitive ion fragmentation pathway was researched by electron ionization mass spectrometry and the stability of ion fragmentation was compared.2α-Hydroxy-oleanolic acid and 2α-hydroxy-ursolic acid were discerned by comparing the abundance of m/z 248,203 and 133.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2010年第5期91-94,共4页
Chemistry and Industry of Forest Products
基金
国家农业科技成果转化项目(2010C30070522)
