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《中国天然药物：英文版》
>Structural characterization and identification of major constituents in Radix Scrophulariae by HPLC coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry
Structural characterization and identification of major constituents in Radix Scrophulariae by HPLC coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry
AIM: To analyze the major constituents in Radix Scrophulariae(Scrophularia ningpoensis). METHOD: Radix Scrophulariae was analyzed by HPLC coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry(ESI-Q-TOF MS/MS). Compounds were separated by HPLC using a C18 column and gradient elution of acetonitrile and 0.1 %(V/V) acetic acid-water. Negative ion mode was employed. RESULTS: A total of thirty-six compounds, including fourteen iridoid glycosides, nineteen phenylpropanoid glycosides, and three organic acids, were identified from Radix Scrophulariae based on the accurate mass measurement of precursor and product ions. Twenty-one of the constituents were identified by comparing their retention times(tR) and ESI-MS/MS data with those of reference standards and/or previous publications, while another fifteen compounds were tentatively identified or deduced according to their Q-TOF MS/MS data which afforded sufficient structural information. CONCLUSION: It is believed that this study is useful for the identification of constituents in Radix Scrophulariae, as well as related plants and complex prescriptions.
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机译：Geology of the Structurally Controlled Quartz Vein Gold Mineralization in the Dikko Area, Part of Zungeru—Minna—Birnin Gwari Schist Belt, NW Nigeria
机译：structurally Designed synthesis of mechanically stable poly(benzoxazine-co-resol)-Based porous Carbon monoliths andTheir application as High-performance CO2 Capture sorbents
