Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Hans C. Krebs"'
Autor:
Hans C. Krebs, Joseph I. Okogun, Gerhard G. Habermehl, Helmut Duddeck, András Simon, Gábor Tóth
Publikováno v:
Magnetic Resonance in Chemistry. 36:371-375
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b6c502d9b4333bfb690c92cbfcdf2fa
https://doi.org/10.1002/(sici)1097-458x(199805)36:5<371::aid-omr279>3.0.co
https://doi.org/10.1002/(sici)1097-458x(199805)36:5<371::aid-omr279>3.0.co
Autor:
Hans C. Krebs, Harisolo Ramiarantsoa
Publikováno v:
ChemInform. 27
Two clerodane-type furano-diterpenes were obtained from the methanolic extract of the bark of Croton hovarum. Structural determinations were made by spectroscopic data. One compound is a novel substance, 3α,4β-dihydroxy-15,16-epoxy-12-oxo-cleroda-1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::714aa785e7f82f3174e99e5e24d2b9b0
https://doi.org/10.1002/chin.199618185
https://doi.org/10.1002/chin.199618185
Autor:
Hans C. Krebs, Harisolo Ramiarantsoa
Publikováno v:
ChemInform. 28
A clerodane- and a nor-clerodane-type furano-diterpene were obtained from the methanolic extract of the leaves of Croton hovarum . Structural determinations which were made from spectroscopic data led to 3,12-dioxo-15,16-epoxy-cleroda-13(16), 14-dien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23f76f188193f349d625dba42cd9d535
https://doi.org/10.1002/chin.199735225
https://doi.org/10.1002/chin.199735225
Autor:
Hans C. Krebs, Harisolo Ramiarantsoa
Publikováno v:
ChemInform. 29
Two piperidine alkaloids were obtained from an ethanolic extract of the leaves of Dialypetalum floribundum . Their structures were determined as N -methyl-2-(2-hydroxybutyl)-6-(2-hydroxypentyl)-piperidine and N -methyl-2,6- bis -(2-hydroxypentyl)-pip
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27b09081473e3c5b472d382302ffb085
https://doi.org/10.1002/chin.199842219
https://doi.org/10.1002/chin.199842219
Autor:
Hans C. Krebs, Gerhard G. Habermehl
Publikováno v:
Magnetic Resonance in Chemistry. 30:S56-S59
Two-dimensional NMR spectroscopy was used for the structure elucidation of glycosides. In particular, the connectivity between different sugar residues and between sugar and acid moieties is discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf6979bbc589525e5e401d76ff59c29a
https://doi.org/10.1002/mrc.1260301312
https://doi.org/10.1002/mrc.1260301312
Publikováno v:
Zeitschrift für Naturforschung B. 46:1415-1420
Secondary enaminones 2 are easily halogenated to yield the so far unknown halogenides 3,4 and 5. Acyloxylation of enaminones 2 by dibenzoylperoxide leads to benzoyloxylated substances 13, which also have not been described jet. Bisacylated products c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8078686fe7bad3b570bd49ce26321968
https://doi.org/10.1515/znb-1991-1020
https://doi.org/10.1515/znb-1991-1020
Autor:
Hans C. Krebs, Harisolo Ramiarantsoa
Publikováno v:
Phytochemistry. 48:911-913
Two piperidine alkaloids were obtained from an ethanolic extract of the leaves of Dialypetalum floribundum . Their structures were determined as N -methyl-2-(2-hydroxybutyl)-6-(2-hydroxypentyl)-piperidine and N -methyl-2,6- bis -(2-hydroxypentyl)-pip
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a069b7236420228bec7ac74cf7eb6c6d
https://doi.org/10.1016/s0031-9422(97)00929-1
https://doi.org/10.1016/s0031-9422(97)00929-1
Autor:
Harisolo Ramiarantsoa, Hans C. Krebs
Publikováno v:
Phytochemistry. 45:379-381
A clerodane- and a nor-clerodane-type furano-diterpene were obtained from the methanolic extract of the leaves of Croton hovarum . Structural determinations which were made from spectroscopic data led to 3,12-dioxo-15,16-epoxy-cleroda-13(16), 14-dien
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09367a9cc80cf970dce2bdd8bcded96c
https://doi.org/10.1016/s0031-9422(96)00815-1
https://doi.org/10.1016/s0031-9422(96)00815-1
Publikováno v:
Zeitschrift für Naturforschung B. 52:107-109
Cyanobacteria (blue-green algae), Microcystis aeruginosa sp., were isolated from a massive bloom in a eutrophic waterbody in Hungary. Their toxic effect, determined by a mouse test, was associated with the occurrence of microcystins YR and LR which w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a411c62248a1f61f81c3b1a50b7746a
https://doi.org/10.1515/znb-1997-0121
https://doi.org/10.1515/znb-1997-0121
Publikováno v:
Phytochemistry. 43:1227-1229
Four macrocyclic pyrrolizidine alkaloids (PA) could be identified and quantified in extracts of the Brazilian Senecio oxiphyllus by means of proton- and inverse-gated decoupling 13C NMR spectroscopy. Seasonal and local differences were found in PA co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9efac56c49dd7286195298dcdf763e34
https://doi.org/10.1016/s0031-9422(96)00445-1
https://doi.org/10.1016/s0031-9422(96)00445-1