ChemInform Abstract: Biologically Active Metabolites from Fungi. Part 16. New Preussomerins J, K, and L from an Endophytic Fungus: Structure Elucidation, Crystal Structure Analysis, and Determination of Absolute Configuration by CD Calculations.

ChemInform ◽  
2010 ◽  
Vol 32 (34) ◽  
pp. no-no
Author(s):  
Karsten Krohn ◽  
et al. et al.
Keyword(s):  
Crystal Structure ◽  
Absolute Configuration ◽  
Endophytic Fungus ◽  
Structure Elucidation ◽  
Crystal Structure Analysis ◽  
Biologically Active ◽  
Active Metabolites ◽  
Determination Of Absolute Configuration ◽  
Biologically Active Metabolites

scholarly journals Preparative-scale HPLC Resolution of Metallacyclic η3-Allyltricarbonyliron Complexes and Determination of the Absolute Configuration by X-Ray Crystal Structure Analysis

1999 ◽  
Vol 23 (9) ◽  
pp. 578-579
Author(s):  
Rainer Schobert ◽  
Hermann Pfab ◽  
Jutta Böhmer ◽  
Frank Hampel ◽  
Andreas Werner
Keyword(s):  
Crystal Structure ◽  
Silica Gel ◽  
Structure Analysis ◽  
Absolute Configuration ◽  
Crystal Structure Analysis ◽  
Preparative Scale ◽  
X Ray ◽  
The Absolute

Racemates of (η3-allyl)tricarbonyliron lactone complex Fe(CO)3{η1:η3-C(O)XCH2CHCMeCH2} 1a (X = O) and (η3-allyl)tricarbonyliron lactam complex 2a (X = NMe) are resolved on a preparative scale by HPLC on cellulose tris(3,5-dimethylphenyl)carbamate/silica gel RP-8 and the absolute configuration of (-)-2a is determined by X-ray crystal structure analysis.

Prismatomerin, a New Iridoid fromPrismatomeristetrandra. Structure Elucidation, Determination of Absolute Configuration, and Cytotoxicity

2007 ◽  
Vol 70 (8) ◽  
pp. 1339-1343 ◽  
Author(s):  
Karsten Krohn ◽  
Dietmar Gehle ◽  
Sujit Kumar Dey ◽  
Nilufar Nahar ◽  
Mohammed Mosihuzzaman ◽  
...  
Keyword(s):  
Absolute Configuration ◽  
Structure Elucidation ◽  
Determination Of Absolute Configuration

scholarly journals (2S,3S,4R,4a'R,5R,5a'R,11a'R,12′S,12a'R)-5-(Acetoxymethyl)-2′,2′,10′,10′-tetramethyloctahydro-3H,8′H-spiro[furan-2,7′-[1,3]dioxino[4′,5′:5,6]pyrano[3,2-d][1,3,6]trioxocine]-3,4,12′-triyl triacetate

IUCrData ◽  
2019 ◽  
Vol 4 (7) ◽  
Author(s):  
H. E. Bollard ◽  
M. G. Banwell ◽  
J. S. Ward
Keyword(s):  
Crystal Structure ◽  
Structure Analysis ◽  
Absolute Configuration ◽  
Title Compound ◽  
Resonant Scattering ◽  
Crystal Structure Analysis ◽  
Compound C ◽  
Synthetic Derivative

While the crystal structure analysis of the title compound, C26H38O15, a synthetic derivative of sucrose, was originally reported 40 years ago [Drew et al. (1979). Carbohydr. Res. 71, 35–42], the present work has allowed for the determination of its absolute configuration through the application of resonant scattering techniques.

scholarly journals Pigmentosins from Gibellula sp. as antibiofilm agents and a new glycosylated asperfuran from Cordyceps javanica

2019 ◽  
Vol 15 ◽  
pp. 2968-2981 ◽  
Author(s):  
Soleiman E Helaly ◽  
Wilawan Kuephadungphan ◽  
Patima Phainuphong ◽  
Mahmoud A A Ibrahim ◽  
Kanoksri Tasanathai ◽  
...  
Keyword(s):  
Antimicrobial Effect ◽  
Pathogenic Fungi ◽  
2D Nmr ◽  
Biologically Active ◽  
Active Metabolites ◽  
Metabolite Profiles ◽  
Array Detection ◽  
Antibiofilm Agents ◽  
Biologically Active Metabolites

In the course of our exploration of the Thai invertebrate-pathogenic fungi for biologically active metabolites, pigmentosin A (1) and a new bis(naphtho-α-pyrone) derivative, pigmentosin B (2), were isolated from the spider-associated fungus Gibellula sp. Furthermore, a new glycosylated asperfuran 3, together with one new (6) and two known (4 and 5) cyclodepsipeptides, was isolated from Cordyceps javanica. The pigmentosins 1 and 2 showed to be active against biofilm formation of Staphylococcus aureus DSM1104. The lack of toxicity toward the studied microorganism and cell lines of pigmentosin B (2), as well as the antimicrobial effect of pigmentosin A (1), made them good candidates for further development for use in combination therapy of infections involving biofilm-forming S. aureus. The structure elucidation and determination of the absolute configuration were accomplished using a combination of spectroscopy, including 1D and 2D NMR, HRMS, Mosher ester analysis, and comparison of calculated/experimental ECD spectra. A chemotaxonomic investigation of the secondary metabolite profiles using analytical HPLC coupled with diode array detection and mass spectrometry (HPLC–DAD–MS) revealed that the production of pigmentosin B (2) was apparently specific for Gibellula sp., while the glycoasperfuran 3 was specific for C. javanica.

Biologically Active Metabolites from Fungi, 4. Palmarumycins CP1–CP4 fromConiothyrium palmarum: Isolation, Structure Elucidation, and Biological Activity

1994 ◽  
Vol 1994 (11) ◽  
pp. 1093-1097 ◽  
Author(s):  
Karsten Krohn ◽  
Andreas Michel ◽  
Ulrich Flörke ◽  
Hans-Jürgen Aust ◽  
Siegfried Draeger ◽  
...  
Keyword(s):  
Biological Activity ◽  
Structure Elucidation ◽  
Biologically Active ◽  
Active Metabolites ◽  
Biologically Active Metabolites
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