Results 11 to 20 of about 314,098 (329)

arrostii roots [PDF]

open access: yes, 2016
A new acylated and triterpenoidal saponin, named GS1, was isolated from the roots of Gypsophila arrostii Guss. On the basis of acid hydrolysis, comprehensive spectroscopic analyses and comparison with spectral data of known compounds, its structure was ...
Arslan, I
core   +2 more sources

Efficient Structure Elucidation of Natural Products in the Pharmaceutical Industry

open access: yesCHIMIA, 2007
The procedure of structure elucidation of natural products at Novartis is discussed. Structure elucidation in an industrial environment has to be time efficient, which is achieved by an optimized workflow and a close integration of all ...
Serge Moss   +7 more
doaj   +1 more source

Rapid prediction of NMR spectral properties with quantified uncertainty [PDF]

open access: yes, 2018
open access articleAccurate calculation of specific spectral properties for NMR is an important step for molecular structure elucidation. Here we report the development of a novel machine learning technique for accurately predicting chemical shifts of ...
Jonas, Eric, Kuhn, Stefan
core   +1 more source

Isolation and Structure Elucidation of Three New Dolastanes from the Brown Alga Dilophus spiralis

open access: yesMarine Drugs, 2013
Three new dolastane diterpenes (1–3) and five previously reported perhydroazulenes were isolated from the organic extracts of the brown alga Dilophus spiralis.
Vassilios Roussis   +2 more
doaj   +1 more source

Accelerated X-ray Structure Elucidation of a 36 kDa Muramidase/Transglycosylase Using wARP [PDF]

open access: yes, 1998
The X-ray structure of the 36kDa soluble lytic transglycosylase from Escherichia coli has been determined starting with the multiple isomorphous replacement method with inclusion of anomalous scattering at 2.7 Å resolution. Subsequently, before any model
Asselt, Erik J. van,   +4 more
core   +5 more sources

(4+2)-cycloaddition of nitroalkenes with ynamines; formation of a 4H-1,2-oxazine 2-oxide derivative [PDF]

open access: yes, 1980
The formation of a thermally unstable (4+2)-cycloadduct, a 4H-1,2-oxazine 2-oxide derivative ( ), from the reaction of 1-nitrocyclopentene with 1-phenyl-2-(1-pyrrolidinyl)acetylene has been proven by the structure elucidation of isoxazole derivative ...
Pennings, M.L.M., Reinhoudt, D.N.
core   +2 more sources

Molecular Characterization of Fungal Pigments

open access: yesJournal of Fungi, 2021
The industrial application of pigments of biological origin has been gaining strength over time, which is mainly explained by the increased interest of the consumer for products with few synthetic additives.
Miriam S. Valenzuela-Gloria   +5 more
doaj   +1 more source

Crystal structure of {[1′-(diphenylphosphino)ferrocenyl]methyl}dimethylammonium chloride monohydrate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2017
Individual ions and the solvating water molecule constituting the structure of the title compound, [Fe(C8H13N)(C17H14P)]Cl·H2O, assemble into dimeric units located around crystallographic inversion centers via N—H...Cl and O—H...Cl hydrogen bonds.
Martin Zábranský, Petr Štěpnička
doaj   +1 more source

Amamistatins isolated from Nocardia altamirensis

open access: yesBeilstein Journal of Organic Chemistry, 2022
Four new phenolic siderophores were isolated from the actinomycete Nocardia altamirensis along with the known natural product amamistatin B and a putative biosynthetic shunt product.
Till Steinmetz, Wolf Hiller, Markus Nett
doaj   +1 more source

Identifying metabolites by integrating metabolome databases with mass spectrometry cheminformatics. [PDF]

open access: yes, 2018
Novel metabolites distinct from canonical pathways can be identified through the integration of three cheminformatics tools: BinVestigate, which queries the BinBase gas chromatography-mass spectrometry (GC-MS) metabolome database to match unknowns with ...
A El-Tayeb   +45 more
core   +1 more source

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