Preliminary study on polyphenol from buds of Delavaya toxocarpa Franch

The quantification and qualification of polyphenols from the buds of Mac Rat (Delavaya toxocarpa Franch) collected in Son La and Cao Bang in the years 2002, 2003 using colum silicagel and sephadex LH20 chromatography gave 2 pure components. Basing on the data of the spectrium of UV, IR1H-NMR and 13C-NMR, DEPT, 2 compounds-acid pcumaric and kaemferol were identified

Chemical composition of essential oil of Delavaya toxocarpa Franch

The extraction of flower and flower bid of Mac Rac collected in Cao Bang and Son La provinces in the years 2002-2003 was studied. Result showed 21 compounds in flower bid volatile oil, in which metyl- abietat and valerenat mainly and 20 compounding in flower volatile oil, metyl abietat and valerianat maninly also, but with higher significantly than in flower bud

Preliminary study on fatty oil extracted from seeds of Delavaya toxocarpa French

The material is seeds of Delavaya toxocarpa French harvested in Cao Bang province in 1999, 2000 and 2001. Fatty oil was quantified by weighing method. The indices of fatty oil were identified in relation to Vietnamese Pharmacopoeia. The fatty acid ingredients were analysed by gas chromatography (GC). The results showed that the fatty oil content in Delavaya toxocarpa French seeds was high (39.63+/-0.836), acidic index was 37.651+/-0.836, iodine index was 69.615+/-1.076, soap index was 180.762+/-3.382. The fatty oil included palmitic, oleic, linoleic, stearic, gadoleic and arachidic acids. Among these, oleic and gadoleic acids had the highest content

Preliminary study on flavonoids in the leaves of Delavaya toxocarpa French

From the leaves of Delavaya toxocarpa French picked up at Cao Bang province, total flavonoids were extracted. From total flavonois, one flavonoid was isolated for the first time. Based on UV, IR, 1H-MNR and 13C-NMR analysis, it was identified to be quercetin