bisulphite/sulphite cleaves thiamine and its biological phosphorylated derivatives into the same pyrimidine moiety and their respective thiazole moiety with pseudo-first order kinetic constants following the order of thiamine greater than thiamine monophosphate greater than thiamine diphosphate greater than thiamine triphosphate over the ph range of 3.9 to 7.0 .
C0039840
thiamine
C0039845
thiamine monophosphate