Gas chromatography-mass spectrometry of oleanane- and ursane-type triterpenes—application to Chenopodium quinoa triterpenes |
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| Authors: | Mirjana Burnouf-Radosevich Norman E. Delfel Roger England |
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| Affiliation: | Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Peoria, IL 61604, U.S.A. |
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| Abstract: | Nine trimethylsilylated pentacyclic triterpenes were separated by GLC on an OV-101 column employing temperature programming. Characteristic retro-Diels-Alder fragmentation was observed in their mass spectra. The fragmentation patterns allowed individual characterization except for certain isomers which, nevertheless, were resolved by GLC, thus permitting their identification. Oleanolic acid and hederagenin were confirmed to be major triterpenes of Chenopodium quinoa seed saponins. |
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| Keywords: | gas chromatography-mass spectrometry triterpenes. |
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