[Resource investigation on rare and endangered She medicine Tetrastigma hemsleyanum in Zhejiang Province].

OBJECTIVE: To investigate the resource of Tetrastigma hemsleyanum which was rare and endangered plant in She nationality in Zhejiang Province. METHODS: Using literature method, survey method, plots method and line method, the resource situation of artificial planting and wild resource in Zhejiang Province were investigated. RESULTS: It was a scarce and precious medicinal herb that wild resource was rare and endangered. There were artificial planting area about 104.55 hm2 which expected to produce 173.91 tons in Zhejiang Province. CONCLUSION: In the wild,it is relatively harsh to environmental requirements for growth. Generally speaking, it takes 3 - 5 years growth period to achieve the medicinal value. The wild resource is scarce and the market demand is increasing, which brings about artificial planting to develop rapidly.

[Study on the spectroscopy of 5-(4-pyridyl)-1,3,4-oxadiazole-2-thiol].

The title compound (5-(4-pyridyl)-1,3,4-oxadiazole-2-thiol) was synthesized by the ring-closing reaction of isoniazide with carbon bisulfide, and the reaction course was discussed preliminarily. The mechanism of this reaction is nucleophilic addition. The compound was characterized by Fourier transform infrared (FTIR) spectrometry and nuclear magnetic resonance (NMR). The thermal analytical data indicate that the compound was decomposed completely at the temperature of 506 degrees C.