COSY相关论文
研究了非标准小尺寸试样的端部淬火试验。通过比例缩小、试样吸热、喷水量的理论计算,制定了非标准试样的试验工艺参数。结果表明,......
Selected results from experiments at COSY-Jülich are presented: an attempt to measure the mass of the η meson with......
A new skeleton bisabolane-type sesquiterpene curcuminoid,bisabocurcumin(1),along with 5 known compounds,curcumin(2), dem......
Two new benzopyran derivatives,1-[(rel 2S,3R)-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]ethanone(1),and 1-[(rel 25,35......
Two novel 27-norergostanol steroids,panthogenins A(1) and B(2),possessing unusual rings E and F featuring a ketal moiety......
Two new ent-kaurane diterpenoids, ent-7a,14b-dihydroxykaur-16-en-15-one-20-oic acid(1) and 1,7a,12b,14b-tetrahydroxy-1,1......
Identification,synthesis and characterization of an unknown process related impurity in eslicarbazep
A new impurity was detected during high performance liquid chromatographic(HPLC) analysis of eslicarbazepine acetate act......
Two new isospirostanol sapogenins named(25R)-5β-spirostane-(1α,3α)-diol(1) and(25R)-5β-spirostane-(1α,2α,3α,4α)t......
Synthesis, Crystal and Molecular Structure and Biological Activity of Dimethyl Trans-3-(2-bromopheny
The compound of dimethyl trans-3-(2-bromophenyl)-2-methylisoxazolidine-4,5-dicarboxylate has been synthesized and charac......
Two new naphthalene derivatives named eucleanal A and B(1 and 2) were isolated from Euclea divinorum.The structures of t......
One new isobenzofuranone derivative,1,4-dimethoxy-3-(3R*-hydroxy-3R*-methyl-1-tetralone)-1(3H)-isobenzofuran(1),was isol......
A novel dimeric diarylheptanoid,named alpinin A(1),along with two known compounds,1,7-diphenyl-5-ol-3-heptanone and 7- (......
The present study was designed to isolate and purify chemical constituents from solid culture of endophyte Aspergillus t......
Two new triterpenoids,named as 2 α,3 β,23-trihydroxylurs-12,20(30)-dien-28-oic acid β-D-glucopyranoside(1),and 2 α,3......
Objective To search for the microorganisms which have the high selectivity of hydrolyzing glycyrrhizic acid(GL) into 18......
目的研究莛子藨Triosteum pinnatifidum地上部分的化学成分。方法采用溶剂萃取、薄层色谱以及硅胶、Sephadex LH-20、反相ODS等柱......
Two new 2-(quinonylcarboxamino)benzoates, named aconicarmiquinamides A(1) and B(2), were isolated from an aqueous extrac......
Synthesis, Characterization and X-ray Crystal Structure of 2-Benzyl-7-butoxyl-9-isobutyl-1-methyl-β-
2-Benzyl-7-butoxyl-9-isobutyl-1-methyl-β-carboline bromide(H-2-65) was synthesized by the reaction of Harmine with 1-io......
罗库溴铵(Rocuronium Bromide)是新的手术前的甾醇类肌松药,其安全性和有效性已得到临床研究和应用的证实.雄甾-3,17-二醇(1)是合......
报道一种新型蛋白磷酸酶抑制剂的高效合成方法及其结构表征。L-组氨酸和去甲斑蝥素在95%乙醇中回流,缩合生成L-组氨酸去甲斑蝥酰亚......
Synthesis and Crystal Structure of (2-Iodo-5-nitrophenyl)-[1-(1-methylazepan-3-yl)-1H-indol-3-yl]met
The title compound (2-iodo-5-nitrophenyl)-[1-(1-methylazepan-3-yl)-1H-indol-3-yl]methanone (C22H22IN3O3 , Mr = 503.07 ) ......
Two new N-methyladenine-containing diterpenes,nemoechines F(l)and G(2),were isolated from the South China Sea sponge Age......
Two new denudatine-type C_(20)-diterpenoid alkaloids, named sinomontanidines A(1) and B(2), were isolated from the roots......
确定了标题化合物的结构。采用红外光谱(IR)、紫外光谱(UV)一维(1H、13C)和二维(1H-1H COSY、HMQC、HMBC)核磁共振光谱(NMR)、质谱......
运用微波辅助合成技术,在二氯甲烷溶液中,60℃条件下,Pyrex管中微波辐射30 min制备得到芳烃钌(Ⅱ)化合物[(η6-RC6H5)Ru(m-MOPIP)C......
Three new pyrrolizidine alkaloids, nervosine VⅡ (1), nervosine VⅢ(2) and nervosine Ⅸ(3) were isolated from the whole......
利用酯3的肼解合成出了8个2-芳氧甲基苯并咪唑-1-乙酰肼(4).其中4c、4d、4f和4g是新化合物.利用元素分析、IR和1H NMR谱对目标化合......
由苯基格氏试剂对马来海松酸三甲酯选择性加成和水解反应,合成了一个新的手性酸,其结构均经元素分析、NMR、MS表征,前体甲酯结构通......
研究了格氏试剂与马来海松酸三甲酯(2)的各官能团的反应活性差异,获得了2个区域选择性加成产物(化合物3和4),各化合物的结构均经元......
从炭角菌属真菌290中分离得到两个新的海松烷型二萜xylarianes A(1)和B(2),以及一个已知的该类二萜16-hydroxy isopimar-7-en-19-o......
Three new non-brominated pyrrole alkaloids,nakamurines A-C(1-3) were isolated from the South China Sea sponge Agelas nak......
Two new tremulane sesquiterpenes coriolopsin A(1) and coriolopsin B(2),together with two known ones conocenol C(3) and c......
Three new C-3 dehydrated bufadienolides were isolated from the venom of Bufo bufo gargarizans. Their structures were elu......
设计合成了1种基于C=N异构化和螯合荧光增强机理(CHEF)的Zn~(2+)荧光探针BMO和NBMO,其结构经~1H NMR,~(13)C NMR,~1H-~1H COSY,HSQ......
拉格朗日证明了在每一点都有切线的连续曲线y=f(x)上,任意一个弦的两端点之间至少能找到曲线上一点,在这点曲线的切线与弦平行(如
......
从除虫菊酯中分离得到瓜菊酯Ⅱ,通过DEPT及1H-1HCOSY,HSQC,HMBC,NOESY等2D NMR技术对该化合物所有的1H和13C NMR信号进行了详细解......
Phytochemical investigation of the aerial parts of Leonurus japonicus led to the isolation of one new labdane diterpenoi......
Twenty-one benzoylated phloroglucinol derivatives bearing homoadamantyl frameworks were isolated from the aerial parts o......
A new ureido-substituted amino acid,conopsamide A(1),has been isolated from an ethanolic extract of the tubers of Gymnad......
Periconones B-E(1-4),four new polyketide-terpenoid hybrid molecules were isolated from the endophytic fungus Periconia s......
从濒危植物大别山五针松(Pinus dabeshanensis)松针(干重仅30 g)的90%甲醇提取物中分离得到10个二萜类化合物,其中新化合物dabesha......
核磁共振(nuclear magnetic resonance,NMR)是一种基于具有自旋性质的原子核在核外磁场作用下,吸收射频辐射而产生能级跃迁的谱学......
Isolation and Structure Elucidation of Autolytimycin, A New Compound Produced by Streptomyces Autoly
Autolytimycin 1 was isolated from the culture filtrate of Streptomyces autolyticus JX-47, together with two known compou......
运用二叉树生长及搜索技术对蛋白质及多个自旋偶合系统的样品体系的多量子滤波COSY及TOCSY谱峰进行划分,产生出对应于氨基酸结构单......
本文提供了N_b-甲基四氢海曼和合成中间体,共十个化合物的~1H NMR谱。各谱线的归属依据它们的2D NMR的同核二维相关谱,COSY指定。......
Purification,Characterization and ~1H NMR Resonance Assignment of an α-Like Neurotoxin BmK 16 from t
A natural scorpion toxin BmK 16 was purified for the first time from the venom of the Chinese scorpion Buthus martensi......
