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Four new eudesmane-type sesquiterpenes, named plebeiolide A-C (1-3) and plebeiafuran (4), together with a known eudesmanolide (5), were isolated from the basal leaves of Salvia plebeia R. Br. Their structures were elucidated by extensive spectroscopic analysis including 1D and 2D NMR, HR-ESI-MS spectra. The absolute configuration of compound 1 was confirmed(More)
This paper describes a paradigm, a simple, low-cost and conventional approach to the fabrication of large-area subwavelength anti-reflective nanostructures on films directly with a bio-template. Specifically, the nano-nipple arrays on the surface of cicada wings have been precisely replicated to a PMMA (polymethyl methacrylate) film with high(More)
The fermented leaf of Ampelopsis grossedentata has been used as a beverage and folk medicine called "vine tea" in the southern region of China. In this paper, the optimum extraction conditions for the maximum recovery amounts of total flavonoids (TF), dihydromyricetin (DMY), myricitrin (MYG) and myricetin (MY) from natural Ampelopsis grossedentata leaves(More)
OBJECTIVE To study the chemical constituents in the seeds of Oroxylum indicum. METHOD Twenty compounds were isolated and purified by silica gel, and Sephadex LH-20 column chromatography, and their structures were determined by spectroscopic analysis including NMR and MS. RESULT Twenty compounds were isolated and identified as oroxin A (1), oroxin B (2),(More)
Two new compounds, 5-methoxy-3',4'-dihydroxy-6,7-methylenedioxy-4H-1-benzo-pyran-4-one(iriskashmirianin A) (1) and 5,3'-dihydroxy-3-(4'-β-D-glucopyranosyl)-6,7-methylenedioxy-4H-1-benzo-pyran-4-one (germanaism H) (2), along with eight known compounds (3-10), were isolated from the rhizomes of Iris germanica L. The cytotoxicities of these compounds were(More)
Twenty-one compounds were isolated from the rhizomes of Iris germanica by various chromatographic techniques such as silica gel, ODS and Sephadex LH-20 chromatography. Their structures were established on basis of physical properties, MS and NMR spectroscopic data Their structures were identified as ombuin (1), 5, 3, 3'-trihydroxy-7, 4'-dimethoxyflavanone(More)
An on-line analysis method by HPLC-DAD coupled with chemiluminescence (CL) and ESI-Q-TOF-MS/MS was established for simultaneous detection and identification of antioxidants in three original plants of traditional Chinese medicine "She-gan". Two new isoflavonoid glycosides, along with 48 known compounds, including isoflavonoid glycosides and their aglycones,(More)
The genus Iris (Iridaceae) comprises over 300 species, which is distributed mainly in the northern hemisphere. Iris germanica L., a perennial herb, is cultivated as an ornamental and aromatic plant in many areas of the world. The rhizomes of I. germanica are traditionally used in Pakistan for dropsy and gall bladder diseases, and as a diuretic,(More)
A novel flavanone glycoside, 3',5',5,7-tetrahydroxy-6-C-β-D-glucopyranosyl-flavanone (1), along with 16 known compounds, (R/S)-eriodictyol-8-C-β-D-glucopyranoside (2), quercetin-3-O-α-L-rhamnosyl (1''' --> 3''')-β-D-glucopyranoside (3), hemipholin (4), 4β-carboxymethyl-(-)-epicatechin methyl ester (5), kaempferol (6), quercetin (7), mangiferin (8),(More)