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Electron ionization induced fragmentation of 4-hydroxychalcone derivatives

, : Electron ionization induced fragmentation of 4-hydroxychalcone derivatives. Rapid Communications in Mass Spectrometry 16(6): 634-637

Analysis of tingenone and tingenol quinonemethide triterpenes was made by gas chromatography/mass spectrometry (GC/MS) of their trimethylsilyl (TMS) ethers. An extra TMS group, in addition to those predicted from the known structures, is added to these compounds during the derivatization process. The electron impact mass spectra showed base peaks at m/z 549 and 623, respectively, for the TMS derivatives of tingenone and tingenol, and electrospray (ES) and collision-activated dissociation (CAD) studies indicate that these ions correspond to losses of a methyl group from the derivatives studied. A mechanism, based on ES-MS/MS studies, is suggested for the derivatization and fragmentation pattern.


PMID: 11870902

DOI: 10.1002/rcm.596

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Ibrahim G.F.; Baldock A.K.; Radford D.R.; Ireland L.B., 1981: Inhibition of staphylococcus aureus growth and entero toxin a production in cheddar cheese produced with variable starter activity. Twelve cheese batches were made with variable starter activity, from milk inoculated with S. aureus. At the end of cheddaring, only half the curd of each batch was salted; each portion was pressed separately, cut and stored at 11 and C f...

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Takeshita T.; Takimizu H.; Ito E.; Yoshioka T., 1991: Effect of differentiation chemicals dimethyl sulfoxide and cyclic amp on the calcium mobilization in neuroblastoma x glioma ng108 15 cells. Neuroscience Research Supplement (16): S76

Dhruva, S.S.; Prasad, V., 2016: Application of Medicare's New Technology Add-on Payment Program for Blinatumomab. JAMA Oncology 2(2): 165-166

Ramos, P.; Hueto, J., 1999: Usefulness of levofloxacin in sinusitis. Enfermedades Infecciosas Y Microbiologia Clinica 17 Suppl 1: 59-62

Huguet-Tapia, Jé.C.; Loria, R., 2012: Draft genome sequence of Streptomyces acidiscabies 84-104, an emergent plant pathogen. A draft genome sequence of the plant pathogen Streptomyces acidiscabies 84-104, an emergent plant pathogen, is presented here. The genome is among the largest of streptomycetes, at more than 11 Mb, and encodes a 100-kb pathogenicity island (PAI) s...

Belliveau D.J.; Naus C.C.G., 1991: Localization of gap junction mrnas during development of the rodent cns. Society for Neuroscience Abstracts 17(1-2): 763

Pull ter Gunne, A.F.; Skolasky, R.L.; Ross, H.; van Laarhoven, C.J.H.M.; Cohen, D.B., 2010: Influence of perioperative resuscitation status on postoperative spine surgery complications. Restrictive transfusion criteria have led to decreased morbidity and mortality in critically ill patients. Their use has been extended to other patient groups. In adult spine surgery, ongoing postoperative blood losses and soft-tissue trauma may m...

Cartajena, Isabel, 2013: Faunal Assemblages from the Middle Holocene Environmental and Cultural Variability in the western slope of the Puna De Atacama. This paper attempts to explain the variability seen in Middle Holocene faunal assemblages from the western slope of the Andes in the Puna de Atacama, Chile. During this time, palaeoenvironmental factors, such as regional aridity strongly impacted...

Klein, C.; Fraitag, S.; Foulon, E.; Raffoux, C.; Bodemer, C.; Blanche, S., 1996: Moderate and transient transfusion-associated cutaneous graft-versus-host disease in a child infected by human immunodeficiency virus. American Journal of Medicine 101(4): 445-446