Is this you? Create Your Porfile
Avatar

Karsten Schaumann

University of Mainz

Network

Latest external collaboration on country level. Dive into details by clicking on the dots.

Explore More

Hotspot

Dive into the research topics where Karsten Schaumann is active.

Explore More

Publication

Featured researches published by Karsten Schaumann.

Phytochemistry | 2003

Evariquinone, isoemericellin, and stromemycin from a sponge derived strain of the fungus Emericella variecolor

Gerhard Bringmann; Gerhard Lang; Stefan Steffens; Eckhard Günther; Karsten Schaumann

From a strain of the fungus Emericella variecolor derived from the marine sponge Haliclona valliculata, two new natural products, evariquinone and isoemericellin, were isolated after HPLC-UV, -MS, and -NMR studies of the extract and their structures were elucidated by mass spectrometry and NMR experiments. Evariquinone showed antiproliferative activity towards KB and NCI-H460 cells at a concentration of 3.16 microg/ml. Furthermore, the fungus was found to produce the known metabolites stromemycin, shamixanthone, and 7-hydroxyemodin. Chemical degradation, NMR decoupling experiments, and spin-system simulation provided evidence for the double bonds in stromemycin to be all E-configured. ROESY experiments established the monosaccharide moiety to be glucose.

Journal of Natural Products | 2004

New communesin derivatives from the fungus Penicillium sp. derived from the Mediterranean sponge Axinella verrucosa.

Raquel Jadulco; Ru Angelie Edrada; Rainer Ebel; Albrecht Berg; Karsten Schaumann; Victor Wray; Klaus G. Steube; Peter Proksch

Journal of Natural Products | 2004

New Natural Products from the Sponge-Derived Fungus Aspergillus niger

J. Hiort; K. Maksimenka; M. Reichert; § S. Perović-Ottstadt; Wenhan Lin; Victor Wray; Klaus G. Steube; Karsten Schaumann; Horst Weber; Peter Proksch; Rainer Ebel; W. E. G. Müller, ,§ and; Gerhard Bringmann

Tetrahedron | 2005

The first sorbicillinoid alkaloids, the antileukemic sorbicillactones A and B, from a sponge-derived Penicillium chrysogenum strain

Gerhard Bringmann; Gerhard Lang; Tobias A. M. Gulder; Hideyuki Tsuruta; Jörg Mühlbacher; Katja Maksimenka; Stefan Steffens; Karsten Schaumann; Rüdiger Stöhr; Jutta Wiese; Johannes F. Imhoff; Sanja Perović-Ottstadt; Olexandra Boreiko; Werner E. G. Müller

Journal of Natural Products | 2002

Online analysis of xestodecalactones A-C, novel bioactive metabolites from the fungus Penicillium cf. montanense and their subsequent isolation from the sponge Xestospongia exigua

RuAngelie Edrada-Ebel; Markus Heubes; Gernot Brauers; Victor Wray; Albrecht Berg; Udo Gräfe; Michael Wohlfarth; Jörg Mühlbacher; Karsten Schaumann; Sudarsono Sudarsono; Gerhard Bringmann; Peter Proksch

Journal of Natural Products | 2005

Diastereomeric quinolinone alkaloids from the marine-derived fungus Penicillium janczewskii.

Jian He; Ulrich Lion; Isabel Sattler; Friedrich A. Gollmick; Susanne Grabley; Jingmin Cai; Marinus Meiners; Henning Schünke; Karsten Schaumann; Ute Dechert; Michael Krohn

Journal of Natural Products | 2000

Anthraquinones and betaenone derivatives from the sponge-associated fungus Microsphaeropsis species : novel inhibitors of protein kinases

Gernot Brauers; Ru Angelie Edrada; Rainer Ebel; Peter Proksch; Victor Wray; Albrecht Berg; Udo Gräfe; Christoph Schächtele; Frank Totzke; Günter Finkenzeller; Dieter Marmé; Jürgen Kraus; Miriam Münchbach; Manuela Michel; Gerhard Bringmann; Karsten Schaumann

Journal of Natural Products | 2004

Petrosifungins A and B, Novel Cyclodepsipeptides from a Sponge-Derived Strain of Penicillium brevicompactum§

Gerhard Bringmann; Gerhard Lang; Stefan Steffens; Karsten Schaumann

Tetrahedron | 2005

The first sorbicillinoid alkaloids, the antileukemic sorbicillactones A and B, from a sponge-derived strain

Gerhard Bringmann; Gregory A. Lang; Tobias A. M. Gulder; Hideyuki Tsuruta; Jörg Mühlbacher; Katja Maksimenka; Stefan Steffens; Karsten Schaumann; Rüdiger Stöhr; Jutta Wiese

Archive | 2005

Method for producing sorbicillactone a

Gerhard Bringmann; Gerhard Lang; Tobias A. M. Gulder; Karsten Schaumann; Werner E. Mueller; Sanja Perović-Ottstadt; Rüdiger Stöhr; Jutta Wiese; Rolf Schmaljohann; Johannes F. Imhoff

Explore More

Collaboration

Dive into the Karsten Schaumann's collaboration.

Top Co-Authors
Avatar

Gerhard Bringmann

Peking University

View shared research outputs
Top Co-Authors
Avatar

Gerhard Lang

University of Mainz

View shared research outputs
Top Co-Authors
Avatar

Stefan Steffens

University of Mainz

View shared research outputs
Top Co-Authors
Avatar

Jutta Wiese

Max Planck Society

View shared research outputs
Top Co-Authors
Avatar

Jörg Mühlbacher

University of Mainz

View shared research outputs
Top Co-Authors
Avatar

Peter Proksch

University of Mainz

View shared research outputs
Top Co-Authors
Avatar

Rüdiger Stöhr

University of Mainz

View shared research outputs
Top Co-Authors
Avatar

Sanja Perović-Ottstadt

University of Mainz

View shared research outputs
Top Co-Authors
Avatar

Werner E. G. Müller

University of Mainz

View shared research outputs
Top Co-Authors
Avatar

Victor Wray

Braunschweig University of Technology

View shared research outputs
Explore More
Researchain Logo
Decentralizing Knowledge