Two new phenolic compounds from the Vietnamese lichen Parmotrema tinctorum

Chemical investigation of the lichen Parmotrema tinctorum (Nyl.) Hale led to the isolation of two new phenolic compounds, 2-ethylhexyl orsellinate (1) and tinctorinone (2). The structures were determined by analysis of their MS and NMR data as well as by comparison with literature data. The 2-ethylh...

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Bibliographic Details
Published in:Natural product research 2022-07, Vol.36 (13), p.3429-3434
Main Authors: Bui, Van-Muoi, Duong, Thuc-Huy, Nguyen, Thi-Anh-Minh, Nguyen, Thi-Ngoc-Van, Nguyen, Ngoc-Hong, Nguyen, Huu-Hung, Chavasiri, Warinthorn, Nguyen, Kim-Phi-Phung, Huynh, Bui-Linh-Chi
Format: Article
Language:English
Subjects:
depsidone
Glucosidase
Lichen
Lichens
Metabolites
methyl orsellinate
NMR
Nuclear magnetic resonance
Parmotrema tinctorum
Phenolic compounds
Phenols
tinctorinone
α-Glucosidase
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Summary:Chemical investigation of the lichen Parmotrema tinctorum (Nyl.) Hale led to the isolation of two new phenolic compounds, 2-ethylhexyl orsellinate (1) and tinctorinone (2). The structures were determined by analysis of their MS and NMR data as well as by comparison with literature data. The 2-ethylhexyl ester group of 2-ethylhexyl orsellinate is uncommon among lichen metabolites. Tinctorinone revealed strong inhibition towards α-glucosidase.
ISSN:1478-6419
1478-6427
DOI:10.1080/14786419.2020.1864367