Abstract:
Mannose, galactose and glucose thiosemicarbazones, and mannose thiocarbohydrazones exist in DMSO solutions as tautomeric mixtures of pyranose and linear hydrazone forms, but in solutions of galactose and glucose thiocarbohydrazones there are also hexahydro-1,2,4,5-tetrazine-3-thione tautomers.