Constituents with Radical Scavenging Effect from Opuntia dillenii: Structures of New α-Pyrones and Flavonol Glycoside

Yingkun Qiu; Yingjie Chen; Yupin Pei; Hisashi Matsuda; Masayuki Yoshikawa

doi:10.1248/cpb.50.1507

Notes

Constituents with Radical Scavenging Effect from Opuntia dillenii: Structures of New α-Pyrones and Flavonol Glycoside

Yingkun Qiu, Yingjie Chen, Yupin Pei, Hisashi Matsuda, Masayuki Yoshikawa

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Keywords: Opuntia dillenii, radical scavenging effect, opuntioside I, 4-ethoxyl-6-hydroxymethyl-α-pyrone, kaempferol 7-O-β-D-glucopyranosyl-(1→4)-β-D-glucopyranoside

JOURNAL FREE ACCESS

2002 Volume 50 Issue 11 Pages 1507-1510

DOI https://doi.org/10.1248/cpb.50.1507

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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-α-pyrone, and kaempferol 7-O-β-D-glucopyranosyl-(1→4)-β-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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