采用Q Exactive Focus高分辨液质联用技术,结合Compounddiscoverer软件中E&L Unknown ID with Online and LocalData-base Searches工作流程,对树脂样品中的可提取物进行鉴定。通过在线和离线数据库对已收载的成分进行检索。对于未知化合物,使用创新的mzLogic算法,利用mzCloud已收载的数百万个碎片结构,对候选结构进行筛选和排序,进一步获得可能的结构。本实验中通过上述策略鉴定到可提取物见表2。
Piper betle Linn. is a traditional plant associated with the Asian and southeast Asian cultures. Its use is alsorecorded in folk medicines in these regions. Several of its medicinal properties have recently been proven. Phytochemicalanalysis showed the presence ofmainly terpenes and phenols in betel leaves. These constituents vary in the different cultivarsof Piper betle. In this paper we have attempted to profile eight locally available betel cultivars using the recently developedmass spectral ionization technique of direct analysis in real time (DART). Principal component analysis has also been employedto analyze the DART MS data of these betel cultivars. The results show that the cultivars of Piper betle could be differentiatedusing DART MS data.