| 摘要 |
The present invention concerns Pyridinium-Betain compounds of the following general formula (A) R1 is H; R2 is a chemical group formed by a sugar pentose or hexose ring, substituted at C5or C6, respectively, with an acid residue taken from the group - photosphoryl, sulfonyl, or carboxyl, and R2 is connected to the pyridaine ring either at C1 or C2 positions; R3 is taken from the group consisting of OH, including the ionised form O<->, R4 is an aliphatic chain (CH2)n, where n is the chain length in the range from n=0 to n=4, R5 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. |
