Study on active chemical constituents of medicinal plants of Cucurbitaceae
The project was funded by the National Natural Science Foundation of China and the Natural Science Foundation of Yunnan Province. The project has adopted a research method of physicochemical extraction, structure identification, activity screening, and other modern methods to develop the chemistry of representative cucurbit plants. The structure and biological activity of the ingredients were studied and the following results were obtained:
1. A series of new resources for the chemical composition of cucurbits were discovered: for the first time, the structure of the drug Xuebaosu was analyzed, and the Chinese chernozem, the large-seeded snow urchin, the horse-breasted sorbet, the vine sorbet, and the flesh flower were found. Snowy gallbladder, fruit-bearing snowy gallbladder, Jeffrey snow gall, big-order snowy gallbladder, large-order grandiflora, and other nine high-level snow gallbladder resource plants; secondly, it has been found to have a solubilizing effect from Chinese snow frogs. Snow gall saponins HMa2 and HMa3 provide the basis for the in-depth development and utilization of Cyclobalanopsis; thirdly, a new sweet glycoside, siamenoside I, was discovered from the endangered mangosteen of Xishuangbanna, Yunnan Province, with a sweetness of 563 times of sucrose is the newest source of the sweetest cucurbit sodium sweetener in the world. Fourthly, a large amount of 3% or more of the dammarane triterpene glycoside rod glycoside A was found The plant is a new source of ginsenosides or damarase.
2. A new model for structural classification of cucurbitacin compounds was proposed, and the original 5 types were reclassified into 12 structural types, which exerted an influence on the judging mode of structural classification of the cucurbitacin triterpenoids and the modified cucurbitacin in the academic community.
3. Based on the study of the chemical components of the cucurbitaceous plants, taking the Chinese cucurbitaceae plants as the main body, from the point of view of chemical systems, a relatively complete cucurbit chemical taxonomy system was proposed, fully reflecting the cucurbitaceae plants. Chemical composition structure supporting the Takhtajan classification system.
The project studied the chemical composition and physiological activity of 23 species of cucurbitaceous plants and found 112 new natural compounds, especially snow gall bisucrose, snow cholestyrimide A, and eleven-leavene snow gallbladder A The novel compounds or structural types such as S. mellifera in the B. and Fritillaria spp. I-III and in the bitter gourd plants add rich content to the natural product database. He has published a total of nearly 40 papers and provided a relatively full theoretical basis and basis for the development and sustainable use of medicinal plants of Cucurbitaceae, especially Xuebao, Luohanguo, Bangzigua, and bitter gourd, and has been used for the sustainable use of new resources of chemical components of Cucurbitaceae. Important academic and guiding significance. The research content and achievements of the project have reached the international advanced level, and the research findings of the novel structural compounds of cucurbitane are at the international advanced level. Experts also suggested that the study of the pharmacological activities of the chemical components of Cucurbitaceae should be further expanded to accelerate the in-depth development and utilization of its resources.
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