A new xanthone from the lichen Parmotrema praesorediosum (Parmeliaceae)

Two xanthone compounds, praesorexanthone A (1) and praesorexanthone B (2), were isolated from the lichen Parmotrema praesorediosum (Nyl.) Hale (Parmeliaceae). Among them, praesorexanthone B is a new natural compound. Their chemical structures were unambiguously determined by the analysis of 1D and 2...

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Bibliographic Details
Published in:Vietnam journal of chemistry 2020-12, Vol.58 (6), p.765-769
Main Authors: Chi, Huynh Bui Linh, Phung, Nguyen Kim Phi
Format: Article
Language:English
Subjects:
hexahydroxanthone‐chromanone dimer
lichen
lichen substances
Parmotrema praesorediosum
tetrahydroxanthone‐chromanone dimer
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Summary:Two xanthone compounds, praesorexanthone A (1) and praesorexanthone B (2), were isolated from the lichen Parmotrema praesorediosum (Nyl.) Hale (Parmeliaceae). Among them, praesorexanthone B is a new natural compound. Their chemical structures were unambiguously determined by the analysis of 1D and 2D NMR and high resolution ESI mass spectroscopic data, as well as by comparison of their NMR data with the ones in the literature.
ISSN:0866-7144
2572-8288
2572-8288
DOI:10.1002/vjch.202000070