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

Journal of the Brazilian Chemical Society

Cardozo, Karina H. M.¹  Universidade de São Paulo, Ribeirão Preto, Brazil¹  Gates, Paul J.¹  Colepicolo, Pio¹  University of Bristol, United Kingdom¹  Galembeck, Sérgio E.¹  Pinto, Ernani¹  Vessecchi, Ricardo¹  Lopes, Norberto P.¹  Universidade de São Paulo, São Paulo, Brazil¹  Guaratini, Thais¹ 

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

DOI  :  10.1590/S0103-50532009000900009

学科分类：化学（综合）

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】

Unknown