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