Cichorins B and C: two new benzo-isochromenes from Cichorium intybus

J Asian Nat Prod Res. 2012;14(4):297-300. doi: 10.1080/10286020.2011.652953.

Abstract

Two new benzo-isochromenes, named cichorins B (1) and C (2), were isolated from Cichorium intybus. The structures of the new compounds were elucidated by detailed spectroscopic analysis such as ¹H, ¹³C NMR, COSY, HMQC, HMBC, and HR-EI-MS. Relative configurations of asymmetric centers of cichorins B and C were determined by the analysis of the ¹H NMR coupling constants together with the 2D NOESY and 1D NOE experiments as well as from [α]²⁵(D) value.

MeSH terms

  • Benzopyrans / chemistry
  • Benzopyrans / isolation & purification*
  • Cichorium intybus / chemistry*
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular
  • Pakistan

Substances

  • Benzopyrans
  • cichorin B
  • cichorin C