Two new phenolic glycosides, 2,3-dihydroxybenzoic acid methyl ester 3-O-β-o-glucopyranosyl-(1-6)-β-D-glucopyranoside (1) and 2,5-dihydroxylbenzofuran 5-O-β-D-xylopyranosyl-(1-6)-O-β-D-glucopyranoside (2), ...Two new phenolic glycosides, 2,3-dihydroxybenzoic acid methyl ester 3-O-β-o-glucopyranosyl-(1-6)-β-D-glucopyranoside (1) and 2,5-dihydroxylbenzofuran 5-O-β-D-xylopyranosyl-(1-6)-O-β-D-glucopyranoside (2), were isolated as the minor chemical constituents from the roots of Gentiana rigescens, along with 15 known compounds. Their structures were elucidated by detailed spectroscopic analysis, including 1D, 2D NMR and chemical method. All of these compounds were isolated for the first time from the title plant. Moreover, compounds 1 and 2 were tested for the antifungal activities on three plant pathogens Peronophythora litchi, Glomerella cingulata, and Glorosprium musarum.展开更多
Gentiana rigescens Franch. ex Hemsl., a local medicinal plant in Yunnan Province, had very rich resources and was widely distributed in nature in the past. However, the population of G. rigescens is shrinking and the ...Gentiana rigescens Franch. ex Hemsl., a local medicinal plant in Yunnan Province, had very rich resources and was widely distributed in nature in the past. However, the population of G. rigescens is shrinking and the wild plants are rare in Yunnan Province, so it is on the verge of extinction at present. Systemic reproduc-tive technique for G. rigescens is established after many years of efforts and il us-trated in this study.展开更多
文摘Two new phenolic glycosides, 2,3-dihydroxybenzoic acid methyl ester 3-O-β-o-glucopyranosyl-(1-6)-β-D-glucopyranoside (1) and 2,5-dihydroxylbenzofuran 5-O-β-D-xylopyranosyl-(1-6)-O-β-D-glucopyranoside (2), were isolated as the minor chemical constituents from the roots of Gentiana rigescens, along with 15 known compounds. Their structures were elucidated by detailed spectroscopic analysis, including 1D, 2D NMR and chemical method. All of these compounds were isolated for the first time from the title plant. Moreover, compounds 1 and 2 were tested for the antifungal activities on three plant pathogens Peronophythora litchi, Glomerella cingulata, and Glorosprium musarum.
基金Supported by Scientific Research Fund from Department of Education of Yunnan Province(2010C119)~~
文摘Gentiana rigescens Franch. ex Hemsl., a local medicinal plant in Yunnan Province, had very rich resources and was widely distributed in nature in the past. However, the population of G. rigescens is shrinking and the wild plants are rare in Yunnan Province, so it is on the verge of extinction at present. Systemic reproduc-tive technique for G. rigescens is established after many years of efforts and il us-trated in this study.