Planta Med 2009; 75 - PA50
DOI: 10.1055/s-0029-1234375

Chemical Constituents from Alnus formosana Burk. III. Polar Constituents from Leaves by HPLC-SPE-NMR and Conventional Methods

YC Lai 1, CK Chen 1, SS Lee 1
  • 1School of Pharmacy, College of Medicine, National Taiwan University, 1, Sec. 1, Jen-Ai Rd., Taipei, 10051, Taiwan, Republic of China

This continual study was aimed to investigate thoroughly the polar constituents present in the n-BuOH- soluble fraction of the leaves of Alnus formosana. [1] The HPLC-SPE-NMR hyphenated technique was applied for such purpose. This effort led to the characterization of 44 compounds, including thirty diarylheptanoids, ten flavonoids, and a coumaroylxyloside. Of these, seventeen compounds (1-1 7) are new. These compounds were further isolated and the structures were confirmed by general spectroscopic analysis.

References: [1] Lee, S.S. et al. (2006) Nat. Prod. Communications 1:461–464.