| 摘要 |
The present invention concerns Pyridinium-Betain compounds of the following general formula (A) R<SUB>1 </SUB>is H R<SUB>2 </SUB>is a chemical group formed by a sugar pentose or hexose ring, substituted at C5 or C6, respectively, with an acid residue taken from the group-phosphoryl, sulfonyl, or carboxyl, and R<SUB>2 </SUB>is connected to the pyridaine ring either at C1 or C2 positions R<SUB>3 </SUB>is taken from the group consisting of OH, including the ionised form O<SUP>-</SUP>, R<SUB>4 </SUB>is an aliphatic chain (CH<SUB>2</SUB>)<SUB>n</SUB>, where n is the chain length in the range from n=0 to n=4, R<SUB>5 </SUB>is taken from the group consisting of residues-hydroxy, methoxy, ethoxy, methyl, ethyl, furfurylthio and derivatives, and wherein the counter-ion is taken from the group consisting of sodium, potassium, ammonium, calcium, chloride, carbonate, sulphate, phosphate, and the like.
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