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Hu-Biao Chen

Publications and source records attributed to Hu-Biao Chen.

6 recordsLinked to original sources
PubMed2006

Quantification and stability studies on the flavonoids of Radix hedysari.

Radix hedysari is not only a restorative food but also a famous Traditional Chinese Medicine. In this study, a simple, reliable, and reproducible high-performance liquid chromatography-ultraviolet method was developed for the first time to determine the true contents of five major flavoniods, naringenin-7-O-alpha-L-rhamanopyranosyl-(1-->2)-beta-d-glucopyranoside, ononin, formononetin, medicarpin, and an unstable flavonoid malonate (formononetin-7-O-beta-D-glucoside-6' '-O-malonate, FGM), and the stability of FGM was also investigated. Flavoniods were selected as chemical markers because they have appeared as one of the major bioactive compound groups in Radix hedysari. The stability results of FGM at different pH showed that it remained relatively stable in acidic aqueous methanol of pH 3. The HPLC assay with an improved sample preparation scheme can be readily utilized as a suitable "chemical" quality control method for Radix hedysari.

Chromatography, High Pressure Liquid↗
PubMed2006

Coumestans from Hedysarum multijugum.

Ten coumestans were isolated from the roots of Hedysarum multijugum. Their structures were elucidated as the new hedysarimcoumestans A-H (1-8), 1,3,9-trimethoxycoumestan (9), and aureol (10), on the basis of spectroscopic analyses.

Coumarins↗
PubMed2005

Two new isoprenyl chalcones from Hedysarum gmelinii.

Two new isoprenyl chalcones, 1-[2,4-dihydroxy-3-(2-hydroxy-3-methyl-3-butenyl)phenyl]-3-(2,2-dimethyl-2H-benzopyran-6-yl)-2-propen-1-one and 1-[4-hydroxy-2-(1-hydroxy-1-methyl-ethyl)-2,3-dihydro-benzofuran-5-yl]-3-[3-(3-methyl-2-butenyl)-4-hydroxy-phenyl]-2-propen-1-one, named hedysarumine A and hedysarumine B, along with a known isoprenyl chalcone paratocarpin E were isolated from the roots of Hedysarum gmelinii for the first time. Their structures were elucidated based on NMR and MS spectral analyses.

Benzofurans↗
PubMed2003

Phylogeny of the Dipsacales s.l. based on chloroplast trnL-F and ndhF sequences.

Sequences of the chloroplast trnL-F region and 3(') end ndhF gene were used to elucidate phylogenetic relationships and the delimitation of families within Dipsacales s.l. Parsimony analyses of individual and combined data were conducted using maximum parsimony method. The most parsimonious tree based on combined trnL-F and 3(') end ndhF data set recognizes seven major clades of Dipsacales s.l. with the following relationships: Apiales (Adoxaceae ((Diervillaceae, Caprifoliaceae s.str.) (Linnaeaceae (Morinaceae (Dipsacaceae, Valerianaceae))))). Both Sambucus and Viburnum have close relationships with Adoxaceae, supporting their inclusion in this family. Caprifoliaceae s.l. (excluding Sambucus and Viburnum) is polyphyletic, and comprises three clades or families, i.e., Linnaeaceae (Abelia, Dipelta, Kolkwitzia, and Linnaea), Diervillaceae (Weigela and Diervilla) and Caprifoliaceae s.str. (Heptacodium, Leycesteria, Lonicera, Symphoricarpos, and Triosteum). This study focuses on the systematic position of Heptacodium, Triplostegia, and Morinaceae; and suggests that Heptacodium is closely related to the other Caprifoliaceae s.str.; Triplostegia is a sister to Dipsacaceae; Morinaceae, which has an affinity with Dipsacaceae, is possibly a sister group with Dipsacaceae-Valerianaceae clade. Our results are highly congruent with those of and.

Animals↗
PubMed2003

Two new pterocarpenes from Hedysarum multijugum.

Two new pterocarpenes were isolated from the roots of Hedysarum multijugum, and their structures were elucidated as hedysarimpterocarpene B (1) and hedysarimpterocarpene C (2) on the basis of spectroscopic data.

Fabaceae↗