Activity-guided isolation of the chemical constituents of Muntingia calabura using a quinone reductase induction assay
Activity-guided fractionation of an EtOAc-soluble extract of the leaves of Muntingia calabura collected in Peru, using an in vitro quinone reductase induction assay with cultured Hepa 1c1c7 (mouse hepatoma) cells, resulted in the isolation of a flavanone with an unsubstituted B-ring, (2 R,3 R)-7-met...
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Published in | Phytochemistry (Oxford) Vol. 63; no. 3; pp. 335 - 341 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
OXFORD
Elsevier Ltd
01.06.2003
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Activity-guided fractionation of an EtOAc-soluble extract of the leaves of
Muntingia calabura collected in Peru, using an in vitro quinone reductase induction assay with cultured Hepa 1c1c7 (mouse hepatoma) cells, resulted in the isolation of a flavanone with an unsubstituted B-ring, (2
R,3
R)-7-methoxy-3,5,8-trihydroxyflavanone (
5), as well as 24 known compounds, which were mainly flavanones and flavones. The structure including absolute stereochemistry of compound
5 was determined by spectroscopic (HRMS, 1D and 2D NMR, and CD spectra) methods. Of the isolates obtained, in addition to
5, (2
S)-5-hydroxy-7-methoxyflavanone, 2′,4′-dihydroxychalcone, 4,2′,4′-trihydroxychalcone, 7-hydroxyisoflavone and 7,3′,4′-trimethoxyisoflavone were found to induce quinone reductase activity.
A flavanone with an unsubstituted B ring, (2
R,3
R)-7-methoxy-3,5,8-trihydroxyflavanone, as well as 24 known compounds, were isolated from an EtOAc-soluble extract of the leaves of
Multingia calabura. All isolates were evaluated for their potential cancer chemopreventive properties using a quinone reductase induction assay. |
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Bibliography: | Medline NIH RePORTER ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0031-9422 1873-3700 |
DOI: | 10.1016/S0031-9422(03)00112-2 |