Methods pinocembrin and its derivatives were synthesized with 2 , 4 , 6 - trihydroxy - phenylethanone as the starting material via four steps including protection of the hydroxy - group , condensation , cyclization and deprotection 方法以2 , 4 , 6 -三羟基苯乙酮为起始原料，经羟基保护、缩合、环化、脱保护合成目标化合物。
2.
At the surface of the pollen grains there are three types of aperturates , including three porates type , three colpates type and three porate - colpates type ; and four types of sculpture , namely , reticulate , striate , striate - reticulate and verrucate . the upper epidermal cells of the leaves of 12 species plants are detected with hpias - 1000 image analytic system through the treatment of binarization , and the experimental methods are proved stable . the results indicated that the waviness of the anticlinal walls ( sfc ) and the ratio of the feret ' s diameter ( slf ) of the epidermal cells of the middle lamina in the third node of leaves starting from the lowerest part of the stem have a relative constant range and could distinguish from each other . oieanolic acid , l , 5 , 8 - trihydroxy - 3 - methoxyxanthone and swertiamarin are separately detected on the tlc , and the different chromatogram of various plants can be considered as characters of identification . the contents of oleanolic acid in 12 species of plants are determinated by hplc , but among the different plants and botanical organs their contents are different , and the highest content in flowers 本文对川鄂产獐牙菜属药用植物资源进行了野外调查、标本采集和鉴定，对12种干燥药材的性状进行了描述，提供了可以鉴别的特征。通过扫描电子显微镜观察的12种本属药用植物的花粉粒均为单粒花粉，萌发孔有3孔型， 3沟型和3孔沟型三种类型；表面纹饰包括网状纹，条状?网状纹，条状纹和瘤状纹四种类型。用hpias ? 1000高清晰度彩色病理图文分析系统对叶片上表皮细胞作图像分析，并进行方法学研究，结果表明，同种植物茎上第3节叶片中段主脉和第1侧脉之间叶上表皮细胞垂周壁弯曲程度sfc值和细胞纵、横向直径的比值slf值，种间有显著差异，每种都有相对恒定范围值。
3.
Two kinds of flavonoids in water extracts , water - extraction and alcohol precipitation , alcohol extracts were found by paper chromatography . they were separated and purified by thin - layer chromatography , one of which was primarily identified by uv as 4 " , 5 - dihydroxy - flavonol etherification or 4 " , 5 , 8 - trihydroxy - flavonol etherification 水提物、水提醇沉物、醇提物等3种提取物纸层析结果显示有两种黄酮类化合物，经薄层层析分离纯化，并进行紫外光谱分析，初步测定其中一组分为4 ， 5 -二羟基黄酮醇醚或4 ， 5 ， 8 -三羟基黄酮醇醚。
