Unexpected novel pheophytin peroxides from the leaves of Biden pilosa

Zong-Huei Li; Chung Kuang Lu; Yueh Hsiung Kuo; Jir Mehng Lo; Ching Kuo Lee

doi:10.1002/hlca.200890016

Unexpected novel pheophytin peroxides from the leaves of Biden pilosa

Zong-Huei Li, Chung Kuang Lu, Yueh Hsiung Kuo, Jir Mehng Lo, Ching Kuo Lee

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Two new pheophytins, bidenphytins A (1) and B (2), with peroxide functionalities on ring E, were isolated from Biden pilosa LINN. var. radiata SCH. BIP., a popular Taiwanese folk medicine. Also isolated were the following six known compounds: pheophytin a (3), (13²R)-13²- hydroxypheophytin a (4), (13²S)-13²-hydroxypheophytin a (5), (13²R)-13²-hydroxypheophytin b (6), (13 ²S)-13²-hydroxypheophytin b (7), and aristophyll-C (8). Their structures were elucidated by spectroscopic methods (UV, IR, 1D-and 2D-NMR) and by mass spectrometry (HR-FAB-MS). Possible biosynthetic pathways for 1 and 2 are proposed.

Original language	English
Pages (from-to)	79-84
Number of pages	6
Journal	Helvetica Chimica Acta
Volume	91
Issue number	1
DOIs	https://doi.org/10.1002/hlca.200890016
Publication status	Published - 2008

ASJC Scopus subject areas

Catalysis
Biochemistry
Drug Discovery
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry

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10.1002/hlca.200890016

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abstract = "Two new pheophytins, bidenphytins A (1) and B (2), with peroxide functionalities on ring E, were isolated from Biden pilosa LINN. var. radiata SCH. BIP., a popular Taiwanese folk medicine. Also isolated were the following six known compounds: pheophytin a (3), (132R)-132- hydroxypheophytin a (4), (132S)-132-hydroxypheophytin a (5), (132R)-132-hydroxypheophytin b (6), (13 2S)-132-hydroxypheophytin b (7), and aristophyll-C (8). Their structures were elucidated by spectroscopic methods (UV, IR, 1D-and 2D-NMR) and by mass spectrometry (HR-FAB-MS). Possible biosynthetic pathways for 1 and 2 are proposed.",

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AU - Li, Zong-Huei

AU - Lu, Chung Kuang

AU - Kuo, Yueh Hsiung

AU - Lo, Jir Mehng

AU - Lee, Ching Kuo

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AB - Two new pheophytins, bidenphytins A (1) and B (2), with peroxide functionalities on ring E, were isolated from Biden pilosa LINN. var. radiata SCH. BIP., a popular Taiwanese folk medicine. Also isolated were the following six known compounds: pheophytin a (3), (132R)-132- hydroxypheophytin a (4), (132S)-132-hydroxypheophytin a (5), (132R)-132-hydroxypheophytin b (6), (13 2S)-132-hydroxypheophytin b (7), and aristophyll-C (8). Their structures were elucidated by spectroscopic methods (UV, IR, 1D-and 2D-NMR) and by mass spectrometry (HR-FAB-MS). Possible biosynthetic pathways for 1 and 2 are proposed.

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Unexpected novel pheophytin peroxides from the leaves of Biden pilosa

Abstract

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