用二维核磁共振法研究肿足蕨碱的结构

从金星蕨科植物山东肿足蕨(Hypodematium sinense Iwatsuki)的全草分得一种新化合物,通过¹H-¹H COSY谱,¹H-¹³C COSY谱和远程¹H-¹³C COSY谱确定其结构是一种具有苯基取代苯并氮杂环辛四烯新型骨架的生物碱,命名为肿足蕨碱(hypodematine)(Ⅰ)。     

用二维核磁共振技术研究野菊花三醇的结构

从野菊花(Chrysanthemum indicum L.)亲脂性极性较大的部分,分离得到一个新的倍半萜成分,命名为野菊花三醇。通过¹H-¹H COSY,¹H-¹³C COSY及远程¹H-¹³C COSY二维核磁共振谱研究,确定其属于(牛龙)牛儿烷衍生物,并确定其结构和相对立体构型。     

免疫抑制成分异雷公藤春碱的分离与结构

从雷公藤(Tripterygium wilfordii Hook.f.)根皮中分离到一种倍半萜生物碱，根据理化性质和光谱(UV，TR，Ms，HRMs，¹HNMR，¹³CNMR．¹H-¹H COSY，¹H-¹³C COSY．2D-NOESY，¹H-¹³C COLOC)数据解析，鉴定为一种新的生物碱，命名为异雷公藤春碱嘛(isowilfortrine)。药理实验证明该生物碱有免疫抑制活性．并发现对白血病细响有抑制作用。     

雷公藤榕碱的结构与分离

目的研究雷公藤(Tripterygium wilfordii Hook.f.)的化学成分。方法应用各种色谱技术进行分离纯化,用UV,IR,MS,HRMS,¹HNMR,¹³CNMR(COM和OFR),¹H-¹H COSY,¹H-¹³C COSY,2D-NOESY,¹H-¹³C COLOC鉴定化合物的结构。结果分离并鉴定了2个生物碱:I为wilforgine,II为雷公藤榕碱(wilfordlongine)。结论化合物II为一种新的倍半萜生物碱。     

用二维核磁共振技术研究赤芝孢子内酯A和B的结构

通过¹H-¹H,¹H-¹³C相关谱(COSY),¹H-¹³C远程偶合相关谱(OOLOC)及NOE二维谱(NOESY)等新的二维核磁共振技术确定了两个新化合物赤芝孢子内酯A和B的结构。     

国产檀香中α-反式香柠烯醇化学结构研究

从国产檀香木Santalum ablum L.分得一个新倍半萜醇,根据光谱(IR,MS,¹H-¹H COSY,¹³C-¹H COSY和¹H-¹H NOESY)解析,确定了它的化学结构和相对立体化学为9(10)-顺,α-反式香柠烯醇[9(10)Z,α-trans-bergamotenol](Ia)。     

叶下珠化学成分的研究

从叶下珠(Phyllantlais urinaria L.)的干燥全草中分得11个化合物。经光谱分析(UV,IR,¹HNMR,¹³C-NMR,¹H-¹H COSY,¹³C-¹H COSY,long range ¹³-¹H COSY,DEPT and MS)和化学反应等,鉴定了其中10个化合物,分别为正十八烷(Ⅰ),β-谷甾醇(Ⅲ),鞣花酸(Ⅳ),胡萝卜甙(Ⅴ),短叶苏木酚酸甲酯(methyl brevifolincarboxylate,Ⅵ),山萘素(Ⅶ),槲皮素(Ⅷ),去氢诃子次酸三甲酯(trimethyl ester dehydrochebulic acid,Ⅸ),没食子酸(Ⅹ),芸香甙(Ⅺ)。晶Ⅱ为一醛类化合物,结构正在鉴定中,晶Ⅵ和Ⅸ为新化合物。     

雷公藤中的二萜内酯类成分

目的研究雷公藤(Tripterygium wilfordii Hook.F.)的化学成分。方法应用各种色谱技术进行分离纯化，用UV，IR，¹H NMR，MS，HRMS，¹H-¹H COSY，¹H-¹³C COSY和NOESY等光谱鉴定化合物的结构。结果共分离得到4个化合物：I为16-羟基雷公藤内酯醇(16-hydroxytriptolide)，II为15-羟基雷公藤内酯醇(雷醇内酯，triptolidenol)，III为雷公藤乙素(tripdiolide)，IV为雷公藤乙素的差向异构体，命名为2-表雷公藤乙素(2-epitripdiolide)。结论化合物IV为新二萜内酯化合物。     

变色马兜铃中银袋内酯甲的结构测定

从变色马兜铃(Aristolochia versicolar S.M.Hwang)块根中分离得一倍半萜内酯(B₃),命名为银袋内酯甲(versicolactone A).无色菱形结晶,分子式C₁₅H₂₀O₂,mp130～132℃,[α]_D⁶+486°(c0.1267,CHCl₃)。经UV,IR,NMR(¹H,¹³C,¹H-¹H COSY,¹H-¹³C COSY,COLOC)以及MS(高分辨和亚稳跃迁)等推定B₃具十二元环状新骨架。     

祁州漏芦蜕皮甾酮类化学成分的研究

从祁州漏芦[Rhaponticum uniflorum(L.)DC.]的根中,分离出三个蜕皮甾酮类化合物Ⅰ,Ⅱ,Ⅲ,其中Ⅱ根据UV,IR,MS,¹³CNMR,¹HNMR,¹H-¹HCOSY,¹H-¹HNOESY,¹H-¹³C COSY,及CD谱确定其结构为(20R,22R,24S)-2β,3β,11α,14α,20,22,24-heptahydroxy-5β-cholest-7-en-6-one,为一新化合物,命名为漏芦甾酮(rhaponfisterone)。化合物Ⅰ和Ⅲ分别鉴定为蜕皮甾酮(ecdysterone)和土克甾酮(turkesterone)。     

Zelkovamycin, a new cyclic peptide antibiotic from Streptomyces sp. K96-0670. II. Structure elucidation

The structure of antibiotic zelkovamycin was elucidated as a cyclic peptide comprising glycyl, 2-aminobutanoyl, 2-amino-2-butenoyl, N-methyl glycyl, alanyl, 1,3-thiazoyl, 7-methoxytryptophanyl and 2-methyldehydrothreonyl residues. The sequence of the amino acids was established by spectroscopic studies including 1H-1H COSY, 13C-1H COSY, 13C-1H HMQC, 13C-1H HMBC, 15N-1H HMQC and 15N-1H HMBC NMR experiments.     

Actiketal, a new member of the glutarimide antibiotics

A new glutarimide antibiotic named actiketal was isolated from the culture fluid of the epiderstatin-producing streptomycete, Streptomyces pulveraceus subsp. epiderstagenes. The IC50 of the antibiotic for inhibition of the incorporation of [3H]thymidine into epidermal growth factor-stimulated Balb/MK cells was 14.5 microM. The structure of this compound was determined by 1H and 13C NMR spectroscopic analyses using 1H-1H COSY, 13C-1H COSY, heteronuclear multiple-bond correlation spectroscopy, selective 13C-[1H] NOE's techniques.     

Structure elucidation of roselipins, inhibitors of diacylglycerol acyltransferase produced by Gliocladium roseum KF-1040

The structures of roselipins 1A, 1B, 2A and 2B were elucidated by spectroscopic studies including 1H-1H COSY, 13C-1H COSY, 13C-1H HMQC and 13C-1H HMBC NMR experiments, and degradation experiments. They have the common skeleton of 2,4,6,8,10,12,14,16,18-nonamethyl-5,9,13-trihydroxy-2E,6E, 10E-icosenoic acid modified with a D-mannose and a D-arabinitol. Roselipin A and B groups were stereoisomers at the arabinitol moiety, which esterified the fatty acid from the different terminal hydroxy residue. Roselipin 2 group was 6"-O-acetyl roselipin 1 group.     

Dioxamycin, a new benz[a]anthraquinone antibiotic

A new antibiotic, dioxamycin (1) was isolated from the culture broth of the strain MH406-SF1, which was closely related to Streptomyces xantholiticus. This antibiotic was purified by countercurrent chromatography, column chromatography and preparative HPLC. The molecular formula of 1 was determined to be C38H40O15 by HRFAB-MS. The structure was determined by spectral analysis of 2D NMR; 1H-1H COSY, 13C-1H COSY, long range 13C-1H COSY (HMBC) and NOESY. The antibiotic is active in vitro against Gram-positive bacteria and some tumor cells. Dioxamycin is a benz[a]anthraquinone antibiotic related to capoamycin.     

Novel antitumor antibiotic phospholine. 2. Structure determination

Phospholine, an antitumor antibiotic, has the molecular formula of C25H40NO8P and possesses a delta-lactone and a phosphoric acid ester as functional groups. Its structure was determined based on interpretation of fast atom bombardment MS, 1H NMR, 13C NMR, 1H-1H correlation spectroscopy (COSY), 13C-1H COSY, heteronuclear multiple bond correlation spectroscopy, elemental analysis and chemical modifications.     

瓦布贝母中一生物碱的2DNMR研究

从家种川贝瓦布种（Ｆｒｉｔｉｌｌａｒｉａ Ｗａｂｕｅｎｓｉｓ Ｓ．Ｙ．Ｔａｎｇ ｅｔ Ｓ．Ｃ．Ｙｕｅｈ）鳞茎中分离出一生物碱，西贝素氮氧化合物，用ＤＥＰＴ技术以及Ｈ－ＨＣＯＳＹ、Ｃ－ＨＣＯＳＹ，Ｃ－ＨＣＯＬＯＣ、Ｈ－ＨＮＯＥＳＹ二维核磁共振技术对其化学结构及构型进行了研究，并全归属了该生物碱的Ｈ、ＣＮＭＲ的化学位移。     

荔枝霜疫霉拮抗菌株链霉菌sp.SC120抗真菌活性代谢物的研究

从土壤样品中筛选，分离得到一株能拮抗荔枝霜疫霉的链霉菌。从此拮抗菌株的发酵液中分离得到了两个活性成分，经光谱分析，两个活性化合物分别鉴定为Leptomycin A和Leptomycin B。运用核磁共振技术（^1H-^1H COSY,^13C-^1H COSY和HBMC）,正确地归属了两个化合物的碳谱数据。两个化合物对荔枝霜疫霉均显示出较强的抑制作用。     

Epiderstatin, a new inhibitor of the mitogenic activity induced by epidermal growth factor. II. Structure elucidation

The structure of a novel antibiotic, epiderstatin, was determined as 4-[3-((Z)-3,5-dimethyl-2-oxopiperidin-6-ylidene)-2-oxopropyl]-2, 6-piperidinedione by spectroscopic analyses of 1H NMR, 13C NMR, 1H-1H correlation spectroscopy (COSY), 13C-1H COSY, heteronuclear multiple bond correlation spectroscopy, UV and IR spectra. The antibiotic belongs to the glutarimide antibiotics, however, the characteristic feature of epiderstatin is that it has a piperidone ring instead of a cyclohexanone ring.     

Two New Sesquiterpene Esters from Celastrus glaucophyllus

Two new sesquiterpene esters, celaglaupin and celaglausin, have been isolated from the root bark of CELASTRUS GLAUCOPHYLLUS. Their structures have been elucidated on the basis of two-dimensional NMR (1)H- (1)H COSY, (13)C- (1)H COSY, and NOESY) and other spectral (UV, IR, HR-mass, and DEPT) analysis as well as chemical methods, respectively.