A Fragmentation study of di-acidic mycosporine-like amino acids in electrospray and nanospray mass spectrometry

Journal of the Brazilian Chemical Society

Karina H. M. Cardozo¹  Ricardo Vessecchi²  Sérgio E. Galembeck²  Thais Guaratini¹  Paul J. Gates²  Ernani Pinto²  Norberto P. Lopes²  Pio Colepicolo¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Paulo São Paulo SP ,Brazil

关键词: mycosporine;    nanoESI-MS/MS;    ESI-MS/MS;    natural products;    algae;   

DOI  :  10.1590/S0103-50532009000900009

来源: SciELO

【 摘 要 】

Two mycosporine (MAAs), containing an extra acid function, were analyzed by nanospray and electrospray ionization tandem mass spectrometry. In contrast to the previous studies it is demonstrated that no significant characteristic methyl radical loss occurred in positive mode. The fragmentation pathway in negative mode was also proposed in this work, along with theoretical calculations to characterize the site of protonation.

【 授权许可】

CC BY   
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