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Mass spectral studies of methoxynaphthoflavones

✍ Scribed by Carlos E. Ardanaz; Federico H. Guidugli; César A. N. Catalán; Pedro Joseph-Nathan

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
139 KB
Volume
13
Category
Article
ISSN
0951-4198

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✦ Synopsis

The electron impact induced fragmentations of seven methoxynaphthoflavones have been studied with the aid of low-and high-resolution measurements, metastable decompositions and isotope labelling using carbon-13 atoms. The retro Diels-Alder cleavage of the methoxynaphthoflavones is strongly influenced by the substituent position providing in most cases intact A-and B-ring fragments. The intensity ratio of these ring fragments appears to be very sensitive to the charge distribution within the parent ion. Copyright

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