Publications by authors named "M Heubes"

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Experimental and theoretical study of stabilization of delocalized forms of semibullvalenes and barbaralanes by dipolar and polarizable solvents. Observation of a delocalized structure that is lower in free energy than the localized form.
Maximilian Seefelder, Markus Heubes, Helmut Quast, W Daniel Edwards, John R Armantrout

J Org Chem· April 2005

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Online analysis of xestodecalactones A-C, novel bioactive metabolites from the fungus Penicillium cf. montanense and their subsequent isolation from the sponge Xestospongia exigua.
Ru Angelie Edrada, Markus Heubes, Gernot Brauers, Victor Wray, Albrecht Berg

J Nat Prod· November 2002

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A photometric screening method for dimeric naphthylisoquinoline alkaloids and complete on-line structural elucidation of a dimer in crude plant extracts, by the LC-MS/LC-NMR/LC-CD triad.
G Bringmann, M Wohlfarth, H Rischer, M Heubes, W Saeb

Anal Chem· June 2001

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Lifting of the degeneracy in semibullvalenes by remote and direct substituents: a quantitative study using variable-temperature carbon-13 NMR spectroscopy.
M Heubes, T Dietz, H Quast, M Seefelder, A Witzel

J Org Chem· March 2001

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Observation of exchangeable protons by high-performance liquid chromatography-nuclear magnetic resonance spectroscopy and high-performance liquid chromatography-electrospray ionization mass spectrometry: a useful tool for the hyphenated analysis of natural products.
G Bringmann, M Wohlfarth, M Heubes

J Chromatogr A· December 2000

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