Two new glycosides of methyl everninate, rhodomollosides A () and B (), were isolated from the aerial parts of a medicinal plant . The structures of and were elucidated on the basis of detailed spectroscopic analyses as well as HPLC analyses for thiazolidine derivatives of their sugar moieties. The sugar moiety of rhodomolloside A () was elucidated to be a rare monosaccharide, D-allose, while rhodomolloside B () was assigned as a D-glucoside of methyl everninate. Furthermore, they were evaluated for their cytotoxicity against RAW264.7 cells, and for their inhibitory effects with a lipopolysaccharide (LPS)-stimulated murine macrophages RAW 264.7 cells model.
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Rhodomollosides A and B, glycosides of methyl everninate from the aerial parts of .
J Asian Nat Prod Res
November 2022
Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region, Chinese Academy of Sciences, Guilin 541006, China.
Two new glycosides of methyl everninate, rhodomollosides A () and B (), were isolated from the aerial parts of a medicinal plant . The structures of and were elucidated on the basis of detailed spectroscopic analyses as well as HPLC analyses for thiazolidine derivatives of their sugar moieties. The sugar moiety of rhodomolloside A () was elucidated to be a rare monosaccharide, D-allose, while rhodomolloside B () was assigned as a D-glucoside of methyl everninate.
View Article and Find Full Text PDF[Phenolic constituents from lichen Usnea longissima].
Zhongguo Zhong Yao Za Zhi
May 2016
Modern Research Center for Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, China.
Sixteen compounds were isolated from lichen Usnea longissima using of various chromatographic techniques including silica gel, Sephadex LH-20, ODS, and semi-preparative HPLC. By spectroscopic data analyses, their structures were identified by as useanol(1), lecanorin(2), 3-hydroxy-5-methylphenyl 2-hydroxy-4-methoxy-6-methylbenzoate(3), lecanorin E(4), 3'-methylevernic acid(5), evernic acid(6), barbatinic acid(7), 3,7-dihydroxy-1,9-dimethyldibenzofuran(8), orcinol(9), O-methylorcinol(10), methyl orsellinate(11), methyl everninate(12), 2,5-dimethyl-1,3-benzenediol(13), 2-hydroxy-4-methoxy-3,6-dimethyl benzoic acid(14), ethyl everninate(15), and ethyl 2,4-dihydroxy-6-methylbenzoate(16). Compound 1 was obtained as a natural product for the first time, and 3,4, 8,10,12, and 13 were isolated from Usneaceae family for the first time.
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