Quercetagetin 7-methyl ether glycosides from Paepalanthus vellozioides and Paepalanthus latipes
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Several new quercetagetin 7-methyl ether glycosides were characterized from the ethanolic extracts of scapes and leaves of Paepalanthus vellozioides and P. latipes. Their structures were determined mainly by 600 MHz NMR spectroscopy. (C) 1999 Elsevier B.V. Ltd. All rights reserved.