The present invention describes 7 aminocoumarin dyes that are substituted one or more times at the 3 , 6 and 8 positions by a sulfonic acid or a salt of a sulfonic acid, said {HEAD ~ dyes} being useful as fluorescent probes or in {TAIL ~ the preparation} of enzyme substrates, caged probes, or adducts with reducing sugars 
useful in
The present invention describes 7 aminocoumarin dyes that are substituted one or more times at the 3 , 6 and 8 positions by a sulfonic acid or a salt of a sulfonic acid , said { HEAD ~ dyes } being useful as fluorescent probes or in { TAIL ~ the preparation } of enzyme substrates , caged probes , or adducts with reducing sugars
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