2-(4,4-DIFTOR-1,3,5,7-TETRAMETHYL-2,6-DISULFO-4-BORO-3A,4A-DIAZA-S-INDACEN-8-YL)-BENZOIC ACID AND ITS DERIVATIVES, METHOD OF THEIR PRODUCTION AND THEIR APPLICATION FOR FLUORESCENT BLINDING OF PROTEIN MOLECULES Russian patent published in 2019 - IPC C07F5/02 G01N21/64 G01N33/533 

FIELD: chemical industry.

SUBSTANCE: invention relates to salts of the compound of formula I with alkali metals, replacing hydrogen atoms in both sulfo groups

,

where R means the N-oxysuccinimidyl group

Also proposed a method of obtaining salts and their use.

EFFECT: salts of the compounds of formula I are fluorescent dyes with better characteristics than their analogues – water solubility, quantum yield, and extinction coefficient – and can be used as fluorescent labels of protein molecules.

3 cl, 4 dwg, 1 ex, 5 tbl