Przewalskia tangutica Maxim. （Solanaceae： Przewalskia） is a perennial herbaceous plant, which is endemic to Tibet and is a rare and endangered Tibetan medicinal plant. In this paper, the morphological characteristi...Przewalskia tangutica Maxim. （Solanaceae： Przewalskia） is a perennial herbaceous plant, which is endemic to Tibet and is a rare and endangered Tibetan medicinal plant. In this paper, the morphological characteristics, seed germination, tissue culture, flower development characteristics, chemical composition, element content and resource characteristics of P. tangutica are summarized and analyzed. Combined with the survival status of P. tangutica, it is suggested that the research on ecological adaptation, survival mechanism, endangerment mechanism and eco- logical functions of P. tangutica should be strengthened.展开更多
Two novel epimeric eremophilane sesquiterpenes, 7β-H-3α-angeloyl-9(10)-ene-11, 12-epoxy-8-oxoeremophilane (1) and 7β-H-3α-angeloyl-9(10)-ene-11, 12-epoxy-8-oxoeremophi- lane (2) were isolated from the methanol ext...Two novel epimeric eremophilane sesquiterpenes, 7β-H-3α-angeloyl-9(10)-ene-11, 12-epoxy-8-oxoeremophilane (1) and 7β-H-3α-angeloyl-9(10)-ene-11, 12-epoxy-8-oxoeremophi- lane (2) were isolated from the methanol extract of the flower of Cacalia tangutica (Franch.) Hand-Mazz. Their structures were characterized by 1D-, 2D-NMR (1H-1H COSY, HMQC, HMBC, 1H-1H NOESY) and HRESI-MS techniques.展开更多
From the extracts of the roots of Cacalia roborowskii (Maxim) Ling, five new eremophilenolides were isolated and their structures identified as 8 beta, 10 beta-dihydroxy-6 beta-methoxyleremophilenolide (1), 3 beta-ace...From the extracts of the roots of Cacalia roborowskii (Maxim) Ling, five new eremophilenolides were isolated and their structures identified as 8 beta, 10 beta-dihydroxy-6 beta-methoxyleremophilenolide (1), 3 beta-acetoxyl-8 beta, 10 beta -dihydroxy-6 beta-methaxyeremophilenolide (2), 3 beta-angeloyloxy-8 beta-, 10 beta-dihydroxy-6 beta-methoxyeremophilenolide (3), 3 beta-(2-methylbutyryloxy)-8 beta, 10 beta-dihydroxy-6 beta-methoxyeremophilenolide (4), and 8 beta-hydroxy-6 beta-methoxyeremophil-7(11), 9-dien-8, 12-olide(5), based on 1D and 2D NMR experiments.展开更多
Essential oil of the subterranean part of Cacalia tangutica(Maxim.)Hand.-Mazz was analyzed by gas chromatography(GC)-mass spectrum(MS)technique in two different capillary columns of different polarities.Thirty-one com...Essential oil of the subterranean part of Cacalia tangutica(Maxim.)Hand.-Mazz was analyzed by gas chromatography(GC)-mass spectrum(MS)technique in two different capillary columns of different polarities.Thirty-one components were identified in the oil and the main compounds were a-zingiberene(13.49%),germacrene D(10.76%),α-pinene(8.54%),caryophyllene(Z-)(6.36%),linalool(6.16%),β-myrcene(4.89%),β-ocimene(Z-)(4.40%)and ocimenone(Z-)(3.58%).The antimicrobial activity of the oil was evaluated against 2 fungi and 12 bacteria including 6 clinically isolated strains using the agar disc diffusion and broth microdilution methods.The results show that the oil presented a broad antimicrobial spectrum and had better antimicrobial activity against yeast and gram-positive bacteria.The minimum inhibitory concentration values were 0.16–5.00 g/L and minimum bactericidal concentration values were 0.16–5.00 g/L.展开更多
文摘Przewalskia tangutica Maxim. （Solanaceae： Przewalskia） is a perennial herbaceous plant, which is endemic to Tibet and is a rare and endangered Tibetan medicinal plant. In this paper, the morphological characteristics, seed germination, tissue culture, flower development characteristics, chemical composition, element content and resource characteristics of P. tangutica are summarized and analyzed. Combined with the survival status of P. tangutica, it is suggested that the research on ecological adaptation, survival mechanism, endangerment mechanism and eco- logical functions of P. tangutica should be strengthened.
基金supported by Foundation of“Bairen Jihua”of CAS in 2000NNSFC(No.20372029 and 20475057).
文摘Two novel epimeric eremophilane sesquiterpenes, 7β-H-3α-angeloyl-9(10)-ene-11, 12-epoxy-8-oxoeremophilane (1) and 7β-H-3α-angeloyl-9(10)-ene-11, 12-epoxy-8-oxoeremophi- lane (2) were isolated from the methanol extract of the flower of Cacalia tangutica (Franch.) Hand-Mazz. Their structures were characterized by 1D-, 2D-NMR (1H-1H COSY, HMQC, HMBC, 1H-1H NOESY) and HRESI-MS techniques.
文摘From the extracts of the roots of Cacalia roborowskii (Maxim) Ling, five new eremophilenolides were isolated and their structures identified as 8 beta, 10 beta-dihydroxy-6 beta-methoxyleremophilenolide (1), 3 beta-acetoxyl-8 beta, 10 beta -dihydroxy-6 beta-methaxyeremophilenolide (2), 3 beta-angeloyloxy-8 beta-, 10 beta-dihydroxy-6 beta-methoxyeremophilenolide (3), 3 beta-(2-methylbutyryloxy)-8 beta, 10 beta-dihydroxy-6 beta-methoxyeremophilenolide (4), and 8 beta-hydroxy-6 beta-methoxyeremophil-7(11), 9-dien-8, 12-olide(5), based on 1D and 2D NMR experiments.
基金This work was supported by the Natural Science Foundation of China(Grant Nos.30370366,30670464).
文摘Essential oil of the subterranean part of Cacalia tangutica(Maxim.)Hand.-Mazz was analyzed by gas chromatography(GC)-mass spectrum(MS)technique in two different capillary columns of different polarities.Thirty-one components were identified in the oil and the main compounds were a-zingiberene(13.49%),germacrene D(10.76%),α-pinene(8.54%),caryophyllene(Z-)(6.36%),linalool(6.16%),β-myrcene(4.89%),β-ocimene(Z-)(4.40%)and ocimenone(Z-)(3.58%).The antimicrobial activity of the oil was evaluated against 2 fungi and 12 bacteria including 6 clinically isolated strains using the agar disc diffusion and broth microdilution methods.The results show that the oil presented a broad antimicrobial spectrum and had better antimicrobial activity against yeast and gram-positive bacteria.The minimum inhibitory concentration values were 0.16–5.00 g/L and minimum bactericidal concentration values were 0.16–5.00 g/L.
