FIELD: chemistry.
SUBSTANCE: invention relates to a compound of the Formula (I) or to its salt, where X is O, S or NRn, where Rn is H; each of R and R1 is independently H; each of R2 and R4 is independently H or -SO3H; R3 is C2-6alkyl substituted with -CO2H; each R5 is independently halogen or -SO3H; and m is 0 or 1. The invention also relates to a nucleotide or oligonucleotide labeled with the specified compound.
EFFECT: technical result is that new compounds are obtained that can be used as fluorescent labels for nucleotides in the sequencing of nucleic acids.
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22 cl, 3 dwg, 2 tbl, 5 ex
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