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    • Trenner 0
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    • Eur. J. Mass Spectrom. (1)
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  • Author Sorted by frequency and by alphabetical order
    • Schmidt, J. (10)
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Publications

Franke, K.; Porzel, A.; Masaoud, M.; Adam, G.; Schmidt, J.; Furanocoumarins from Dorstenia gigas Phytochemistry 56 611-621 (2001) DOI: 10.1016/S0031-9422(00)00419-2
  • Abstract
  • BibText
  • RIS

A series of linear and angular prenylated furanocoumarins and a benzofuran derivative were isolated from leaves and twigs of Dorstenia gigas (Moraceae), a plant occurring endemically on Socotra Island (Yemen). The structures were elucidated by spectroscopic methods (NMR, MS, UV) and chemical derivatization.

Publications

Franke, K.; Masaoud, M.; Schmidt, J.; Cardanols from Leaves of Rhus thyrsiflora Planta Med. 67 477-479 (2001) DOI: 10.1055/s-2001-15813
  • Abstract
  • BibText
  • RIS

A mixture of 3-substituted alkyl- and alkenylphenols including nine new compounds (cardanols) was isolated from leaves of the Yemenian plant Rhus thyrsiflora (Anacardiaceae) and identified by GC-MS. The position of the double bond in the compounds bearing a monolefinic side chain was determined by their typical MS fragmentation patterns after hydroxylation and trimethylsilylation.

Publications

Schmidt, J.; Blitzke, T.; Masaoud, M.; Structural Investigations of 5-Methylchromone Glycosides from Aloe Species by Liquid Chromatography/Electrospray Tandem Mass Spectrometry Eur. J. Mass Spectrom. 7 481-490 (2001) DOI: 10.1255/ejms.464
  • Abstract
  • BibText
  • RIS

The mass spectral behavior of a series of 5-methylchromone glycosides isolated from two Aloe species was investigated by liquid chromatography/positive-ion electrospray (ES) mass spectrometry using collision-induced dissociation (CID) mass spectrometry. The CID mass spectra of the [M + H]+ ions show a typical fragmentation pattern reflecting the several substructures (substitution at C-7, C-9 and C-10, position and nature of the ester moiety at C-2) of the 5-methylchromone glycosides. Besides a series of known 5-methylchromone glycosides, nine new compounds of this type were identified by LC/ES-CIDMS from Aloe rubroviolacea and Aloe perryi (Aloeaceae).

Publications

Blitzke, T.; Masaoud, M.; Schmidt, J.; Constituents of Aloe rubroviolacea Fitoterapia 72 78-79 (2001) DOI: 10.1016/S0367-326X(00)00239-2
  • Abstract
  • BibText
  • RIS

The isolation of three C-glycosyl chromones, four anthraquinones and a mixture of phytosterols from the leaves of Aloe rubroviolacea was reported.

Publications

Blitzke, T.; Schmidt, J.; Masaoud, M.; 7-O-Methylaloeresin A - A New Chromone Glycoside from Commiphora socotrana Nat. Prod. Lett. 15 27-33 (2001) DOI: 10.1080/10575630108041254
  • Abstract
  • BibText
  • RIS

A new 5-methylchromone glycoside, named 7-O-methylaloeresin A (2-acetonyl-8-C-β-D[2′-O-(E)-4-hydroxycinnamoyl]glucopyranosyl-7-methoxy-5-methylchromone, 1), was isolated from Commiphora socotrana (Burseraceae). Its structure was elucidated by spectroscopic data (MS, UV, 1H- and 13C-NMR).

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