Halophila johnsonii Eiseman is a shallow-water marine angiosperm which contains UV-absorbing metabolites. Studies on methanol extracts of H. johnsonii by means of HPLC-UV, NMR, HPLC-MS resulted in isolation and identification of seven previously unknown flavone glycosides: 5,6,7,3',4',5'-hexahydroxyflavone-7-O-beta-glucopyranoside (1), 5,6,7,3',4',5'-hexahydroxyflavone-7-O-(6''-O-acetyl)-beta-g...

Inula grantioides (Boiss.) syn. /. cutchica Clarke is found in South West Pakistan, Karachi (Sindh), Kutch, Indus delta and Baluchistan. The plant is recommended for the treatment of asthma. This plant has not been subjected to chemical investiga­ tion so far. In the present paper we wish to report the isolation of two new flavones, grantionin 1 and grantioidinin 2 along with pluchidione 3, a k...

1. Subject and source Tecomella undulata (Smith) Seem. commonly known as`Rajasthan Teaka is one of the codominant species in the desert of western Rajasthan (Arya et al. have been reported from this plant. 3. Present study The concentrated petroleum ether extract prepared from the air dried leaves of T. undulata by Soxhlet apparatus, was chromatographed over a column of silica gel.

The immuno-pharmacological properties of ethanolic extract of Nyctanthes arbor-tristis Linn. (NA) have been investigated. After administration of Nyctanthes arbor-tristis in doses of 0.25 and 0.5 g/kg body weight (BW) a significant increase in phagocytic index, leukocyte count and spleenic antibody secreting cells were noticed. Stimulation of humoral immune response was further observed with he...

Polygala fallax Hemsl., a species belonging to the genus and family Polygalaceae, is primarily distributed in southern China. Wild P. Hemsl. (Polygalaceae) currently endangered, but its utilization value has not yet been thoroughly investigated. The present review summarizes morphological structural characteristics, wild resource distribution, chemical constituents pharmacological efficacy, art...

A new oxyprenyl coumarin was isolated from the lipophilic exudate of Ozothamnus lycopodioides. Its structure was established as 7-(3,3'-dimethylallyloxy)-5-hydroxy-6-methoxycoumarin from its UV, MS and NMR spectral data, especially two dimensional experiments. In addition to six earlier reported flavonols, we found four highly substituted flavones, including two rare methylenedioxyflavones.

The growing interest in skin lightening has recently renewed attention on the esthetic applications of Chinese herbal medicine. Although Scutellaria baicalensis Georgi is used for antipyretic and antiinflammatory purposes, its whitening effect remains unclear. This study reports three major findings: (1) S. baicalensis has a potent inhibitory effect on melanogenesis; (2) wogonin and its glycosi...

The solvatochromic characteristics of flavone and 7-hydroxyflavone were investigated in neat and binary solvent mixtures. The spectral shifts of these solutes were correlated with the Kamlet and Taft parameters (α, β and π*) using linear solvation energy relationships. The multiparametric analysis indicates that both specific hydrogen bond donor ability and non-specific dipolar interactions of ...