dihydroxy相关论文
Identification of the metabolites of biologically active xanthones isolated from Halenia elliptica D
Metabolism study has been carried out on 1-hydroxy-2,3,5-trimethoxyxanthone(HM-1) and 1-hydroxy-2,3,4,7- tetramethoxyxan......
Three neolignans, (±)-demethylnitidanin(1), herpetol(2) and salvinal(3) were synthesized from methyl 4,5-dihydroxy-3-me......
Prediction of the ~(13)C NMR Chemical Shifts of 9,10-Dihydrophenanthrene Analogues by the GIAO Metho
After the geometry optimizations at the B3LYP/6-31+G(d,p) level, the NMR calculations of a series of 9,10-dihydrophenant......
A new benzophenone glycoside,2,6-dihydroxy-4-O-β-D-glucopyranosylbenzophenone(1),was isolated from the leaves of guajav......
A sensitive and selective electrochemical sensor for the determination of glutathione(GSH) was developed using a modifie......
Brnsted acidic ionic liquids, namely 2-pyrrolidonium hydrogen sulfate, N-methyl-2-pyrrolidonium hydrogen sulfate, N-me......
A series of new aurone derivatives was prepared by means of a practical route and their anti-vascular smooth muscle cell......
Characterization of 1,4-dihydroxy-2-naphthoyl-coenzyme A synthase(MenB) in phylloquinone biosynthesi
The gene product Sll1127 is a predicted 1,4-dihydroxy-2-naphthoyl-CoA synthase catalyzing an intramolecular Claisen cond......
Synthesis, Crystal structure and Antioxidant of 3,5-Dihydroxy-N′-(5-bro-2-hydroxybenzylidene)benzohy
A new compound, 3,5-dihydroxy-N′-(5-bro-2-hydroxybenzylidene)benzohydrazide hydrate, has been synthesized and character......
该文对烟叶的化学成分及其生物活性进行研究,采用硅胶,Sephadex LH-20,MCI GEL CHP 20P,HPLC等色谱技术分离纯化,根据波谱学数据(U......
目的研究白苞裸蒴Gymnotheca involucrata全草的化学成分。方法利用反相硅胶柱色谱和反相制备液相色谱等手段进行分离纯化,并通过1......
Synthesis and Antitumor Activity of 2-[1-(2-Formylamido-3-phenylpropionyloxy)alkyl]-1,4dihydroxy-9,1
A series of 2-[1-(2-formylamido-3-phenylpropionyloxy)alkyl]-1,4-dihydroxy-9,10-anthraquinone(2FPADHAQ) derivatives was d......
采用硅胶柱色谱、Sephadex LH-20、半制备HPLC等柱色谱技术,从藏药波棱瓜子中分离得到4个化合物,通过化合物的理化性质和波谱数据......
The first synthesis and structural characterization by X-ray crystallography of racemic 2,2’-dihydroxy-[1,1’]binaphtha......
目的:研究及己根的倍半萜类化学成分。方法:利用硅胶柱层析、Sephadex LH-20柱和制备液相等色谱技术进行分离纯化,并应用核磁共振......
目的研究兴安毛连菜Picris davurica地上部分的化学成分,并进行初步活性评价。方法采用MCI、Sephadex LH-20和ODS柱色谱分离化合物......
采用正、反相硅胶柱色谱及半制备高效液相色谱等方法从人面果叶子95%乙醇提取物的乙酸乙酯部位分离得到15个化合物,分别鉴定为5,7,......
利用多种色谱分离方法对金樱子根中的化学成分进行分离和纯化,并根据化合物的理化性质和光谱分析进行结构鉴定。从金樱子根的乙酸......
目的:研究治咳川贝枇杷滴丸提取物中的化学成分。方法:通过正相硅胶、反相硅胶、聚酰胺、Sephadex LH-20等柱色谱方法以及制备型HP......
A new compound,3,5-dihydroxy-N’-(4-nitrobenzylidene)benzohydrazide(Ⅰ),has been synthesized and characterized by single......
Three new C-3 dehydrated bufadienolides were isolated from the venom of Bufo bufo gargarizans. Their structures were elu......
One new 2-arylbenzofuran derivative, artocarstilbene B(1), one new benzaldehyde derivative,(E)-3,5-dihydroxy-4-(3-methyl......
对植物内生真菌团青霉的大米发酵产物进行化学成分研究,从其乙酸乙酯的提取物中分离得到9个已知化合物。通过波谱手段、理化常数以......
通过多种色谱分离方法对角果木根部真菌Fusarium sp.JG13代谢产物的化学成分进行研究,从其发酵液中分离得到6个化合物,利用波谱等......
Studies on the Automated Determination of Total Rare Earths in Al-Re Alloys by Automated Flow Inject
The automatic determination of the total rare earths in the aluminium-rare earth alloys was studied by using our recent......
Two new compounds, 8(14),15 isopimaradiene 2 α,3α ,19 triol (1), and 6 α,7β dihydroxy 17(20) cis 5α ......
Thirteen triterpenoids, including three new ones, miyoshianols A (1), B (2) and C (3), were isolated from Huperzia miy......
从雷公藤(Tripterygiumw wilfordii Hook.f.)根中分到两种oleanane型的新五环三萜内酯——雷公藤内酯甲和乙(wilforlide A和B),经I......
Sensitized photo-redox reaction——Ⅶ.The Synthesis,FAB mass spectrum,stationary absorption,emission,tr
In DMSO/water(4:1),photolysis of the dihydroxy-Sn(IV)-rnesoporphyrin dimethyl ester(SnP)/methyl viologen(MV~(2+))/ethyl......
Determination of the acid dissociation constants of N-carboxymethyl-N-(p-hydroxy phenyl carbamoylmet
The acid dissociation constants of N-carboxymethyl-N-(p-hydroxy phenyl carbamoyl-methyl)-2,3-dihydroxy-5-carbomethoxy b......
Studies on steroidal plant-growth regulator Ⅶ.Synthesis of 2α,3α-dihydroxy-7-oxa-6-oxo-23,24-dinor-B
Two brassinolide analogues,(2)and(3),have been synthesized from hyodeoxycholic acid(4)through a sequence of reactions a......
β-(2,3-Dihydroxybenzoyl)butyric acid (1), a new natural product, has been synthesizedfrom o-vahillin via a seven-step ......
Ilexsaponin A, a new triterpene saponin, was separated from root barks of Hex pubes-cens Hook et Arn. Its structure is ......
Studies on the chemical constituents of Eucalyptus robusta Sm.——Isolation and identification of robu
Nine known compounds, 5-hydroxy-4’,7-dimethoxy-6, 8-dimethylflavone, 4’,5-dihydroxy-7-methoxy-6, 8-dimethyIflavone, 3......
溶剂在卤化银乳剂的制备中起着非常重要的作用。本工作合成了1,8-二羟基-3,6-二硫代辛烷(1,8-dihydroxy-3,6-dithiaoctane或3,6-di......
1970年Monsanto研究组从前手性烯烃不对称催化氢化得到L-Dopa.特别是可用不对称催化剂催化合成维生素、药物、香料和其它精细化学......
Inclusion reaction of reaction 1, 1’-bi-2-naphthol and (S)-proline was examined uuder the solid state and the solid-liq......
Two new ent-kaurane diterpenoids, xerophilusin E (1) and xerophilusin F (2), were isolated from the leaves of Isodon xer......
We synthesised a natural product (10), isolated from G.parvifolium, and its analog. The synthetic product was characteri......
A new monoterpene glycoside,2,6-dimethyl-2E,6E-octadienoic acid 1,6’-lactone 8-β-D glucopyranoside, was isolated from ......
The structure of a new abietane diterpenoid, taxayunnin (1), from the barks of Taxus yunnanensis, was determined by spec......
methyl-5-propyl-7, 12-dihydroxy chromone-12-O-β-D-glucopyranoside was isolated from the stem of Cassia siamea. The str......
A facile synthetic route for two chalcone analogues was developed. The key step was selective deprotection of MOM in ar......
First Enantioselective Synthesis of (2R,3R)-and(2S,3S)-2-(4-hydroxyphenyl)-3-hydroxymethyl-1,4-benzo
A novel enantioselective synthetic approach to 1,4-benzodioxane lignans was reported in which (2R, 3R)- and (2S, 3S)-2-(......
