RESUMO
Using a UHPLC-TOF/MS method combined with software of Masslynx V4.1 and database in the literatures, a total of 20 polygala oligosaccharide esters (POEs) were identified in 60% ethanol extract of Kai Xin San (KXS-60%E). Furthermore, 14 POEs as well as 4 POE-metabolites were identified in rat plasma. The results revealed that POEs and POE-metabolites which were identified in rat plasma, were key components in KXS-60%E and the potential bioactive compounds for KXS action in the treatment of AD.
RESUMO
OBJECTIVE: To develop a method of quantitative analysis of multicomponents by singlemarker (QAMS) for simultaneous determination of six oligosaccharide esters in Polygalae Radix. METHODS: 3, 6'-Disinapoyl sucrose (DISS) was used as the internal reference substance. The relative correlation factors (RCF) of sibiricose A5, sibiricose A6, tenuifoliside B, tenuifoliside A, and tenuifoliside C to DISS were calculated. The contents of the six oligosaccharide esters in 20 different batches of Polygalae Radix were determined by both external standard method and QAMS. The assay results were compared to evaluate the accuracy of QAMS method. RESULTS: The RCF of sibiricose A5, sibiricose A6, tenuifoiside B, tenuifoliside A, and tenuifoiside C to DISS were 1.23, 1.16, 1.56, 1.79, and 0.92, respectively. Under different experimental conditions, the RCF had good reproducibility, and there was no significant difference in the quantitative analysis results between the external standard method and QAMS method. CONCLUSION: The QAMS method is feasible and credible, and can be used for the quality control of oligosaccharide esters in Polygalae Radix.