| 摘要 |
New optical brighteners of the general formula <IMAGE> in which R denotes hydrogen, alkyl, alkoxyalkyl, cyclohexyl, methylcyclohexyl, benzyl, phenylethyl, phenyl, alkylphenyl or xylyl, X denotes a C2-C7-alkylene group or a bridge member of the formula -X1-(OX2)n- in which X1 and X2 denote C2H4 or C3H7 and n denotes 1 or 2 and Me denotes a proton, an alkali metal cation or a cation NH2R1R2 in which R1 and R2 represent hydrogen, alkyl or hydroxyalkyl.
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