Identification and structural elucidation of steroidal saponins from the root of Paris polyphylla by HPLC-ESI-QTOF-MS/MS
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The root of Paris polyphylla (RPP) is widely used as a traditional Chinese medicine for a long time due to the good properties of heat-clearing and detoxicating, detumescence, sedation, acesodyne and haemostasis. To clarify on the bioactive substances and ensure the safety in clinical medication, a feasible and accurate strategy was developed by applying the high-performance liquid chromatography coupled to electrospray ionisation and quadrupole time-of-flight-mass spectrometry (HPLC-ESI-QTOF-MS/MS). Separation was performed an Agilent poroshell 120 EC-C18 column (2.7 × 100 mm, i.d., 2.7 μm) with 0.1% formic acid aqueous solution and acetonitrile as the mobile phase under gradient conditions. Based on the proposed strategy, 30 constituents, mainly including steroidal saponins, were characterised or tentatively identified, 2 of which were the first to be reported as the potential new steroidal saponins in RPP. In conclusion, the HPLC-ESI-QTOF-MS/MS is a feasible and credible technique to separate and identify steroidal saponins from botanical extracts.