from the sulfonyl indoles, which methods can be used to assemble the arsonate carbocyanine dyes of the present invention. Likewise, the methods described in these publications for preparing different N-substitutions can be equally applied to the preparation of arsonate dyes (A1) with diverse N-substituents. Typically, the N-substituent provides linkers with reactive groups (the -L-Rx moiety) for introducing the dyes into nucleic acids, proteins and other biomolecules. Alternatively, aryl arsonate…
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