Structure of a novel glycopeptidolipid antigen containing a O-methylated serine isolated from Mycobacterium xenopi. Complete 1H-NMR and 13C-NMR assignment
نویسندگان
چکیده
منابع مشابه
Complete 1H-NMR and 13C-NMR spectral assignment of five malonyl ginsenosides from the fresh flower buds of Panax ginseng
BACKGROUND Ginsenosides are the major effective ingredients responsible for the pharmacological effects of ginseng. Malonyl ginsenosides are natural ginsenosides that contain a malonyl group attached to a glucose unit of the corresponding neutral ginsenosides. METHODS Medium-pressure liquid chromatography and semipreparative high-performance liquid chromatography were used to isolate purified...
متن کاملSYNTHESIS OF SOME SUBSTITUTED NAPHTHALENES VIA BENZYNE AND THEIR 13C-NMR AND 'H-NMR STUDIES
Aprotic diazotization of anthranilic acid with isoamylnitrite or amylnitrite gave benzenediazonium-2- carboxylate. Subsequent thermal decomposition of this diazonium salt (in situ) in 1,2-dichloroethane as a solvent at 85OC and in the presence of 2,5-diethyl-3,4-diphenylcyclopentadienonaes a trapping agent gave 1,4-diethyl-2, 3-diphenylnaphthalene in high yield, after loss of carbon monoxid...
متن کاملThermodynamics, Solvents effects and 1H ,13C NMR Shielding :Theoretical studies of Adamantane
Some of the Adamantane properties were calculated in this study. Chemical shift, free energy ofsolvation, free energy of cavity formation, Henry's law constant, and other properties ofAdamantane in dry phase, three solvents and three temperatures have been calculated with Abinitio method base on density functional theory (DFT) at B3lyp/6-31g, B31yp/6-31g*, B3lyp/6-31+g* and B3lyp/6-31++g** leve...
متن کاملEvaluation of a 1H-13C NMR Spectral Library
A simple database of (13)C/(1)H-(13)C spectral lists for 11 673 natural products was created in standard commercial database format. Over 50% of the spectra were predicted using HOSE code descriptors derived from the 50% of spectra having experimental values. Prediction errors obtained by prediction of and comparison to the experimental spectra revealed an exponentially decaying dependence betw...
متن کاملMass spectrometry assisted assignment of NMR resonances in reductively 13C-methylated proteins.
Reductive 13C-methylation of proteins has been used as an isotope labeling strategy to study protein structure, function, and dynamics by nuclear magnetic resonance (NMR) spectroscopy. However, assigning the resulting 13C-dimethylamine peaks in a 1H-13C NMR spectrum has proved to be difficult, but it is important to expand the scope of the method. The assignment strategy presented here utilizes...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 1993
ISSN: 0014-2956,1432-1033
DOI: 10.1111/j.1432-1033.1993.tb17935.x