Unexpected Novel Pheophytin Peroxides from the Leaves of Biden pilosa
In: Helvetica Chimica Acta, Jg. 91 (2008), Heft 1, S. 79-84
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Zugriff:
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 ), (13 2 R )‐13 2 ‐hydroxypheophytin a ( 4 ), (13 2 S )‐13 2 ‐hydroxypheophytin a ( 5 ), (13 2 R )‐13 2 ‐hydroxypheophytin b ( 6 ), (13 2 S )‐13 2 ‐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
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Autor/in / Beteiligte Person: | Lee, Tzong‐Huei ; Lu, Chung‐Kuang ; Kuo, Yueh‐Hsiung ; Lo, Jir‐Mehng ; Lee, Ching‐Kuo |
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Zeitschrift: | Helvetica Chimica Acta, Jg. 91 (2008), Heft 1, S. 79-84 |
Veröffentlichung: | Wiley, 2008 |
Medientyp: | academicJournal |
ISSN: | 0018-019X |
DOI: | 10.1002/hlca.200890016 |
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