Analysis of extracts obtained from shoots, roots and exudates of Brassica alba revealed the presence of 3,5,6,7,8-pentahydroxy-4'-methoxy flavone in shoots, as well as 2',3',4',5',6'-pentahydroxy chalcone and 3,5,6,7,8-pentahydroxy flavone in roots and exudates. Apigenin was also found in the shoots and roots, but not in the root exudates.

Two new phenylethanoid glycosides integrifoliosides A (2) and B (3), along with a known phenylethanoid glycoside alyssonoside (1) and a flavone glucoside chrysoeriol-7-O-beta-D-glucopyranoside (4) were isolated from the aerial parts of Phlomis integrifolia. The structures of the new compounds were identified as 3,4-dihydroxy-beta-phenylethoxy-O-beta-D-apiofuranosyl-(1 --> 4)-alpha-L-rhamnopyran...

The flavonoids of Crotalaria grahamiana (family Popilionaceae) were isolated from the alcoholic extract by partition with benzene, diethyl ether, ethyl acetate respectively. On the basis of chemical and spectral analysis their structures are elucidated as 4’hydroxy flavone-7-O-rhamnoside and its aglycone.Identification of unknown compounds were established through comparison of chromatographic ...

In the title compound (alternatively called 4',5,7-trimethoxy-flavone methanol solvate hydrate), C(18)H(16)O(5)·CH(3)OH·H(2)O, the flavone mol-ecule is almost planar, the inter-planar angle between the planes of the benzopyran-4-one group and the attached benzene ring being 4.69 (9)°. In the crystal, the flavone mol-ecule makes inter-molecular C-H⋯O hydrogen bonds to adjacent inversion-related ...

The present study involves the investigation of antiinflammatory activity for 2’, 4’ dihydroxy flavone by TPA [12OTechanoyl 13 – Myristate] induced inflammation in Polymorphonuclear leukocytes [PMNL]. The cell viability was assayed by Trypan blue dye exclusion assay, MTT assay, release of Cathepsin D, Nitrite and TNF-α levels. Diclofenac sodium was used as the standard drug. The selected dihydr...

l,2Methylenedloxy-6-methyl-4H-dibenzo [de,g] quinoline -4,5(6H)-dione together with 5-hydroxy-4',7-dimethoxyflavone; /J-sitosterol, stigmasterol and esters from the lauric and stearic acids, were isolated from the stem of Piper manausense Yunk (Piperaceae). INTRODUCCIÓN Aporphine alkaloids have been studied extenslvely because these compounds are of pharmacological significant importance (1). T...

Anal. Calcd for CzoHleOl: C, 75.0; H, 5.0. Found: C, 75.0; H, 5.0. 3-Deoxysericetin (16) and 3-Deoxyisosericetin (15). To a solution of 2 (500 mg) in dry benzene (40 ml) was added DDQ (300 mg) and the whole solution refluxed for 1 hr. It was filtered while hot, benzene distilled off, and the residue subjected to column chromatography. Elution with benzene-light petroleum (2%) gave a solid which...

BACKGROUND In the current study, we isolated four known compounds, two phenanthrenes, 2,5-dihydroxy-4,9-dimethoxy phenanthrene [1] and 4-methoxyphenanthrene-2,7-diol (flavanthrinin) [2], one phenanthrenequinone, 5-hydroxy-2,3-dimethoxy-1,4-phenanthrenequinone [3], and one flavone, 3,5,7-trihydroxyflavone (galangin) [4], from the ethyl acetate (EtOAc) extract of Odontoglossum Harvengtense 'Tutu'...