Compounds of the formula ##STR1## wherein R.sub.1 is lower alkyl or phenyl lower alkyl; R.sub.2 is phenyl or substituted phenyl; and R.sub.3 is substituted or unsubstituted phenyl, naphthyl or indolyl; are fluorogenic reagents which react with primary amino groups to form fluorophors. The above compounds are useful for fluorescent labeling of materials of biological importance.
式子为##STR1##的化合物,其中R.sub.1是低烷基或苯基低烷基; R.sub.2是苯基或取代苯基; R.sub.3是取代或未取代的苯基、
萘基或
吲哚基。这些化合物是荧光试剂,可以与一级
氨基团反应形成荧光物质。上述化合物可用于
生物重要物质的荧光标记。