Studies on Coumarins of a Chinese Drug “Qian-Hu” V. Coumarin-glycosides from “Zi-Hua Qian-Hu”1

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Abstract
Decuroside V [3′ (R)-hydroxy-nodakenin-3′-ol] and decuroside IV [nodakenetin 4′-O-β-D-apiofuranosyl (1→6)β-D-glucopyranolsyl], two new coumarin glycosides, were isolated from a Chinese drug sold under the name of Si-Qian-Hu (Seizenko) and Kwan-Si Qian-Hu (Koseizenko), the roots of Peucedanum decursivum Maxim. (Umbelliferae). The structures were determined by means of spectroscopic analysis and chemical reactions. 1H-NMR spectra showed the β-configuration of the all sugar linkages.