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New Phenolic Components from Daphne giraldii

✍ Scribed by Shang-Gao Liao; Bang-Le Zhang; Yan Wu; Jian-Min Yue

Publisher
John Wiley and Sons
Year
2005
Tongue
German
Weight
104 KB
Volume
88
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Two new bis‐coumarins, namely daphnogitin (1), daphnogirin (2), and a flavan‐3‐ol derivative, 5‐O‐methylafzelechin (3), together with eleven known compounds, daphnetoxin, 1,2‐dihydrodaphnetoxin, daphnetin, daphnoretin, daphneticin, isodaphneticin, trans‐2,3‐dihydro‐3‐(4‐hydroxy‐3‐methoxyphenyl)‐2‐(hydroxymethyl)‐9__H__‐pyrano[2,3‐f]‐1,4‐benzodioxin‐9‐one (= demethoxyisodaphneticin; 4b), (+)‐pinoresinol, acuminatin, (−)‐dihydrosesamin, and isosalicifoline, were isolated from the leaves and stems of Daphne giraldii. Compound 4b was isolated for the first time as a natural product, and 1,2‐dihydrodaphnetoxin, daphneticin, isodaphneticin, (+)‐pinoresinol, acuminatin, (−)‐dihydrosesamin, and isosalicifoline were isolated for the first time from Daphne giraldii. The structures of the three new compounds were elucidated by spectroscopic analysis.

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