中国特有植物珙桐化学成分研究

从我国特有植物珙桐(Davidia involucrata Baill.)枝条中得到6个化合物,经化学和光谱分析,分别鉴定为蒲公英萜酮(D_1)、蒲公英萜醇(D_2)、β-谷甾醇(D_3)、3,4-O,O-次甲基-3′-O-甲基鞣花酸(D_4)、3,3′,4-O-三甲基鞣花酸(D_3)、鞣花酸(D_4)。     

搭棚藤的化学成分研究

从搭棚藤(Prana discifera Schneid)茎叶的乙醇提取物中分离得6个化合物,经波谱分析和与已知品对照,分别确定为scopoletin(1)、scopolin(2)、cassiachromone(3)、4’-羟基汉黄芩素(4)、β-谷甾醇(5)和胡萝卜苷(6)。其中化合物1,2,3和4均为首次从该植物中分离得到。     

玄参化学成分研究（英文）

采用硅胶柱色谱、反相柱色谱、凝胶LH-20柱色谱、制备液相色谱等方法从中药玄参中分离得到15个化合物,并结合波谱数据及理化性质对其进行结构鉴定,分别鉴定为:哈巴俄苷(1)、哈巴苷(2)、益母草苷A(3)、6-O-甲基梓醇(4)、京尼平苷(5)、6-O-α-L-鼠李糖基桃叶珊瑚苷(6)、ningpogenin(7),甘草素(8),邻苯二甲酸二(2-乙基己)酯(9),麦芽糖(10),熊果酸(11),丙三醇(12),5-羟甲基糠醛(13),胡萝卜苷(14)及β-谷甾醇(15)。其中化合物3、6、8、9、10、12均为首次从该植物中分离得到。     

碎米花杜鹃根的化学成分研究

采用硅胶柱色谱、Sephadex LH-20柱色谱等手段从碎米花杜鹃Rhododendron spiciferum根中分离得到15个化合物,根据化合物的理化性质和光谱数据分别鉴定为(-)-南烛木树脂酚(1)、(+)-环合橄榄树脂素(2)、(-)-南烛木树脂酚-9-O-β-D-葡萄吡喃糖苷(3)、(-)-南烛木树脂酚-9-O-β-D-木吡喃糖苷(4)、3,5,7-三羟基色原酮-3-O-α-L-鼠李吡喃糖苷(5)、3,5,7-三羟基色原酮-3-O-α-L-阿拉伯吡喃糖苷(6)、柚皮素(7)、圣草酚(8)、紫杉叶素(9)、儿茶素(10)、紫杉叶素-3-O-α-L-阿拉伯吡喃糖苷(11)、黄杞苷(12)、紫杉叶素-3-O-α-L-阿拉伯呋喃糖苷(13)、蒲公英赛醇(14)、蒲公英赛醇乙酸酯(15)。其中化合物1~6、8、9、13~15为首次从该植物中分得。     

米团花的化学成分研究

从米团花(Leucosceptrum canum Smith)鲜叶中分到三个化学成分,经光谱测定和化学反应已确定它们的化学结构分别为异香紫苏醇(isosclaveol)Ⅰ;柳穿鱼黄素(pectolinarigenin)Ⅱ;β-谷甾醇(β-sitosterol)Ⅲ。其中化合物Ⅰ为新的天然存在的labdane类型二萜化合物。     

蒙药沙冬青的化学成分研究

从蒙古沙冬青分离得到了7个非生物碱类化合物,通过波谱学方法及与文献对照的方法鉴定为:β-谷甾醇(1)、白藜芦醇(2)、染料木素(3)、芒柄花素(4)、毛异黄酮(5)、maackiain(6)和trifolirhizin(7).其中化合物2、6和7为首次从蒙古沙冬青植物中得到.     

山荔枝化学成分的研究

从山荔枝 (Dendrobenthamiacapitata(Wall.)Hutch .)的叶和皮的乙醇提取物中分离得到 6个化合物 ,经波谱分析鉴定为双氢杨梅苷 (dihydromyricetin ,1)、儿茶素 ((+) gallocatechin ,2 )、表儿茶素((- ) epicatechin ,3)、异槲皮苷 (isoquercitrin ,4 )、乌苏酸 (ursolicacid ,5 )和胡萝卜苷 (daucosterol,6 ) ,其中化合物 1,2 ,3和 4均首次从该植物中分离得到。     

藏东瑞香茎叶化学成分的研究

运用各种色谱分离方法对藏东瑞香（Daphne bholua）地上部分的乙醇提取物进行分离纯化,从中分离得到12个化合物。通过波谱学数据并与已知化合物数据作比较,它们分别鉴定为：木犀草素（1）、芫花素（2）、芫花素5-O-β-D-葡萄糖苷（3）、3＇-羟基-芫花素（4）、3＇-甲氧基．芫花素（5）、异新狼毒素（6）、Genkwanol B（7）、Oleo-daphnone（8）、阿魏醛（9）、香草醛（10）、对羟基苯甲酸乙酯（n）移谷甾醇（12）。所有这些化合物都为从该植物中首次分离鉴定。     

广藿香大极性化学成分的研究

从广藿香(Pogostemon cablin (Blance)Benth.)地上部分乙醇提取物的正丁醇萃取部位分离得到13个化合物.通过光谱和波谱分析,分别鉴定为:芹菜素(1)、3,5,4'-三羟基-7-甲氧基黄酮(2)、3,5-二羟基_4',7-二甲氧基黄酮(3)、Apigenin 7-galacturonide(4)、Apigenin 7-(O-methylghacuronide)(5),Luteolin 7-O-(6-O-methyl-β-D-glucuronopyranoside)(6),4',5-二羟基-3',7-二甲氧基二氢黄酮(7)、Quercetha-7-β-D-ghcoside(8),3,23-Dihydroxy-12-oleanen-28-oic acid(9)、Syringaresinol-β-D-glucoside(10),毛蕊花糖苷(11)、列当苷(12)、紫葳新苷(13),化合物2～13均为首次从该植物中分离得到.     

A new biologically active triterpenoid saponin from the aerial parts of Neanotis wightiana

Phytochemical investigation of the aerial parts of Neanotis wightiana for the first time has led to the isolation of one new triterpenoid saponin, neanoside A (1), along with seven known compounds, oleanolic acid (2), ursolic acid (3), β-sitosterol (4) and its glucoside (5), stigmasterol (6) and its glucoside (7) and hexacosanoic acid (8). The structures of these compounds were elucidated by means of spectroscopic (NMR, MS and other) and chemical techniques as well as comparison with literature data. The structure of 1 was elucidated as 3-O-α-l-rhamnopyranosyl-(1 → 2)-β-d-xylopyranosyl (1 → 3)-β-d-glucopyranosyl bayogenin. The in vitro biochemical analysis of compound 1 against the activity of human serum liposomal enzymes, SGOT (serum glutamate oxaloacetate transaminase), SGPT (serum glutamate pyruvate transaminase) and ALP (alkaline phosphatase) and glycerol kinase showed significant reduction of their activity.     

Five new agarofuran sesquiterpene polyesters from Osyris lanceolata

Phytochemical investigation of the root bark and stem bark of Osyris lanceolata resulted in the isolation of five new agarofuran sesquiterpene polyesters (1–5). The structures of the compounds were elucidated on the basis of their IR, UV, MS and NMR spectroscopic data.     

New clerodane diterpenoids from the aerial parts of Pulicaria wightiana

Two new ent-clerodane-type diterpenoids, compounds 1 and 2, were isolated from the aerial parts of Pulicaria wightiana, together with three known constituents. Their structures were established based on spectroscopic data, and their antibacterial activities were evaluated (Table 2).     

天山棱子芹化学成分的研究

从天山棱子芹中首次分离得到15个已知化合物,通过NMR、MS及IR等波谱数据,分别鉴定为6,7-二羟基香豆素(1),( )-marmesin(2),marmesinin(3),5,7,4'-三羟基黄酮(4),莰非醇3-O-α-L-吡喃鼠李糖甙(5),藤黄菌素3'-O-β-D-吡喃葡萄糖甙(6),(R)-6-hydroxy-3-(2-hydroxypropan-2-yl)-6-methylcyclohex-2-enone(7),4-羟基苯甲酸(8),3-甲氧基4羟基苯甲酸(9),3-甲氧基-4,5-亚甲二氧基苯甲酸(10),丁香酸甲酯(11),丁香酸甲酯4-O-β-D-吡喃葡萄糖甙(12),姜油酮4’-O-β-D-吡喃葡萄糖甙(13),2-(4-羟基苯基)-乙醇(14)和正二十八醇(15)。其中化合物7为一新的天然产物。     

Sesquiterpenes from the east African sandalwood Osyris tenuifolia

The essential oil of the east African sandalwood Osyris tenuifolia was investigated by chromatographic and spectroscopic methods. Beside several already known sesquiterpenes four new compounds could be isolated by preparative gas chromatography and their structures investigated by mass spectroscopy and NMR techniques. Two of the new compounds--tenuifolene (17) and ar-tenuifolene (15)--show a new sesquiterpene backbone. 2,(7Z,10Z)-Bisabolatrien-13-ol (23) and the cyclic ether lanceoloxide (21) belong to the bisabolanes.     

Studies on the Chemical Components of Oxytropis ochrocephala Bunge

Oxytropis ochrocephala Bunge has been characterized as one of the most destructive plants to livestock in the North-Western China. Its chemical components have not been studied. We have been isolated four flavonoids from the aerial parts of Oxytropis ochrocephala Bunge. They have been identified as quercetin, rhamnocitrin, isoquercitrin and rhamnocitrin-3-glucoside by UV, IR, 1HNMR and MS spectra of these flavonoids. Their acetyl derivatives have been prepared and their 1HNMR and MS spectra are fully in accord with this conclusion. The rhamnocitrin-3-glucoside has been found first of all in Oxytropis species. It is perhaps valuable for chemotaxonomy of Oxytropis genus.     

Studies on the Chemical Constituents of Rhododendron capitatum Maxim

Ten compounds were isolated from the aqueous extract of Rhododendron capitatum Maxim and identified as scopoletin, fraxefin, grayanomxin Ⅰ, Ⅱ, Ⅳ, raffinose, hyperin, capitatin, quercetin and myricefin, respectively, on the basis of physico-chemical properies, UV, IR, NMR and MS data. The capitatin was a new compound.