| CPC G01N 33/582 (2013.01) [C07F 9/091 (2013.01); C07F 9/572 (2013.01); C07F 9/65583 (2013.01); C07F 9/65586 (2013.01); C07F 9/6561 (2013.01); C09B 3/14 (2013.01); C09B 11/26 (2013.01); C09B 69/101 (2013.01); C09B 69/102 (2013.01); C09B 69/103 (2013.01); C09B 69/109 (2013.01); G01N 33/52 (2013.01); G01N 33/533 (2013.01); C07F 9/09 (2013.01); C07F 9/094 (2013.01); C07F 9/098 (2013.01); C07F 9/5765 (2013.01)] | 19 Claims |
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1. A compound having the following structure (IA):
![]() or a stereoisomer, salt or tautomer thereof, wherein:
M is, at each occurrence, independently a fluorescent dye, wherein at least one occurrence of M has absorbance for use in fluorescence resonance energy transfer (FRET), and at least one occurrence of M has emissions for use in FRET;
L1 is at each occurrence, independently either i) an alkylene linker; ii) a heteroalkylene linker including at least one nitrogen atom; or iii) a linker comprising a triazolyl functional group;
L2 and L3 are, at each occurrence, independently an alkylene or heteroalkylene linker;
R1 is, at each occurrence, H;
R2 is Q, or a protected form thereof, or a linker comprising a covalent bond to Q;
R3 comprises a deoxythymidine (dT) group;
R4 is, at each occurrence, OH, O− or ORd;
R5 is, at each occurrence, oxo;
Rd is a counter ion;
Q is a moiety comprising a sulfhydryl, disulfide, activated ester, isothiocyanate, azide, alkyne, alkene, diene, dienophile, acid halide, sulfonyl halide, phosphine, «-haloamide, biotin, amino or maleimide functional group, wherein the activated ester is an N-succinimide ester, imidoester or polyflourophenyl ester, and wherein the azide is an alkyl azide or acyl azide;
m is, at each occurrence, independently an integer of one to 10;
n is an integer of one to 32; and
z is an integer from 2 to 25.
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