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A modified method of additions in PMR spectroscopy was described for quantitative determination of the main active principle in preparations. The effectiveness and reliability of the method was approved for quantitative analysis of the active principle lagochilin in the substance (2.0%) and...
Ellagic acid derivatives were isolated from Dipentodon sinicus and their structures were identified as 3,3′,4′-tri- O -methylellagic acid ( 1 ), 3,3′-di- O -methylellagic acid ( 2 ), 4,4′-di- O -methylellagic acid ( 3 ), 3,3′-di- O -methylellagic acid-4′- O -α-L-rhamnopyranoside ( 4...
One new flavonol glycoside named terniflonoside A ( 1 ) and four known flavonol glycosides were isolated from the whole plants of Clematis terniflora . The structure was determined by 1D and 2D NMR, ESI-MS techniques, and chemical methods.
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