From the methanol extract of the whole plant of Schnabelia oligophylla Hand.-Mazz. (Lamiaceae), a new cyclic octopeptide, named schnabepeptide (1), was isolated by silica gel chromatography. Its structure was elucidat...From the methanol extract of the whole plant of Schnabelia oligophylla Hand.-Mazz. (Lamiaceae), a new cyclic octopeptide, named schnabepeptide (1), was isolated by silica gel chromatography. Its structure was elucidated by spectroscopic analyses and the absolute configuration of the amino acid units, except for proline and glycine, were assigned by chiral HPLC analysis. Bio-assay showed that schnabepeptide (1) exhibited an immunosuppression activity on T/B lymphocytes. Along with the new compound, seven known compounds, octadeca-9, 16-dioxo-10(E),12(Z),14(E)-trienoic acid (2), 12, 16-epoxy-11, 14-dihydroxy-17( 15-->16), 18 (4-->3)-diabeo-abieta-3,5,8,11,13,15-hexene-2, 7-dione (teuvincenone F, 3), abscisic acid (4), beta -sitosterol (5), daucosterol (6), stigmasteryl 3-O-beta -D-glucopyranoside (7) and palmitic acid (8), were also isolated from this plant.展开更多
报道了中国兰科(Orchidaceae)石豆兰属(Bulbophyllum)2个新记录种——拟环唇石豆兰(Bulbophyllum gyrochilum Seidenf.)、泰国卷瓣兰(Bulbophyllum thaiorum J. J. Smith)及中国大陆1新记录种,乌来卷瓣兰(Bulbo-phyllum macraei(Lindl.)...报道了中国兰科(Orchidaceae)石豆兰属(Bulbophyllum)2个新记录种——拟环唇石豆兰(Bulbophyllum gyrochilum Seidenf.)、泰国卷瓣兰(Bulbophyllum thaiorum J. J. Smith)及中国大陆1新记录种,乌来卷瓣兰(Bulbo-phyllum macraei(Lindl.) Reichb. f.),并提供描述及照片。展开更多
文摘From the methanol extract of the whole plant of Schnabelia oligophylla Hand.-Mazz. (Lamiaceae), a new cyclic octopeptide, named schnabepeptide (1), was isolated by silica gel chromatography. Its structure was elucidated by spectroscopic analyses and the absolute configuration of the amino acid units, except for proline and glycine, were assigned by chiral HPLC analysis. Bio-assay showed that schnabepeptide (1) exhibited an immunosuppression activity on T/B lymphocytes. Along with the new compound, seven known compounds, octadeca-9, 16-dioxo-10(E),12(Z),14(E)-trienoic acid (2), 12, 16-epoxy-11, 14-dihydroxy-17( 15-->16), 18 (4-->3)-diabeo-abieta-3,5,8,11,13,15-hexene-2, 7-dione (teuvincenone F, 3), abscisic acid (4), beta -sitosterol (5), daucosterol (6), stigmasteryl 3-O-beta -D-glucopyranoside (7) and palmitic acid (8), were also isolated from this plant.
基金Supported by the National Natural Science Foundation of China(30871960)
文摘报道了中国兰科(Orchidaceae)石豆兰属(Bulbophyllum)2个新记录种——拟环唇石豆兰(Bulbophyllum gyrochilum Seidenf.)、泰国卷瓣兰(Bulbophyllum thaiorum J. J. Smith)及中国大陆1新记录种,乌来卷瓣兰(Bulbo-phyllum macraei(Lindl.) Reichb. f.),并提供描述及照片。
