Rare biscoumarins and a chlorogenic acid derivative from Erycibe obtusifolia

Phytochemistry. 2007 Jul;68(13):1775-80. doi: 10.1016/j.phytochem.2007.05.001. Epub 2007 Jun 13.

Abstract

Three coumarins, 7,7'-dihydroxy-6,6'-dimethoxy-3,3'-biscoumarin (1), 7,7'-dihydroxy-6,6'-dimethoxy-8,8'-biscoumarin (2) and 7-O-[4'-O-(3'',4''-dihydroxycinnamyl)-beta-d-glucopyranosyl]-6-methoxycoumarin (3), and a chlorogenic acid derivative, methyl-3-O-(4''-hydroxy-3'',5''-dimethoxybenzoyl)-chlorogenate (4) were isolated from the roots of Erycibe obtusifolia along with four known coumarins, scopoletin (5), scopolin (6), cleomiscosin A (7) and cleomiscosin B (8). Their structures were elucidated by spectroscopic methods. Among them, compounds (1) and (2) are rare carbon-carbon linked symmetrical biscoumarins.

MeSH terms

  • Chlorogenic Acid / analogs & derivatives*
  • Chlorogenic Acid / chemistry
  • Chlorogenic Acid / isolation & purification
  • Convolvulaceae / chemistry*
  • Coumarins / chemistry*
  • Coumarins / isolation & purification
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular

Substances

  • Coumarins
  • methyl-3-O-(4'-hydroxy-3',5'-dimethoxybenzoyl)chlorogenate
  • Chlorogenic Acid