Potential Threats Posed by New or Emerging Marine Biotoxins in UK Waters and Examination of Detection Methodologies Used for Their Control: Cyclic Imines.

The differences in chemical structures between SPX-C and D, that present an additional methyl substitution on the imine ring, and SPX-A and B may be significant, as the first two compounds are resistant to oxalic hydrolysis whereas the second two compounds are converted to the biologically inactive SPX-E and F when the same reaction is applied [ 3 , 20 , 21 ].

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