Constituents with radical scavenging effect from Opuntia dillenii: structures of new alpha-pyrones and flavonol glycoside

  • Chem Pharm Bull (Tokyo). 2002 Nov;50(11):1507-10. doi: 10.1248/cpb.50.1507.
Yingkun Qiu  1 ,  Yingjie Chen ,  Yupin Pei ,  Hisashi Matsuda ,  Masayuki Yoshikawa
Affiliations
  • 1. Shenyang Pharmaceutical University, China.
PMID: 12419920 DOI: 10.1248/cpb.50.1507
Abstract

The aqueous ethanolic extract from the fresh stems of Opuntia dillenii HAW. showed potent radical scanvenging activity. Three new compounds, opuntioside I, 4-ethoxyl-6-hydroxymethyl-alpha-pyrone, and kaempferol 7-O-beta-D-glucopyranosyl-(1-->4)-beta-D-glucopyranoside, were isolated from the extract. The structures of the new compounds were determined on the basis of chemical and physicochemical evidence and the radical scavenging effects of principal constituents were examined.

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