FIELD: organic chemistry, peptides.
SUBSTANCE: invention proposes a method for labeling phosphorylated peptides, method for adsorption of phosphorylated peptides and compounds possessing high coordination capacity with respect to phosphorylated peptides that are used in such methods, and compounds used as parent substances. Chelating compound is represented by the formula (I): 
wherein X represents linker group; Y represents fluorescent group or biotin as labeling group. Compound of the formula (I) provides easy detection and identification of phosphorylated peptide in a sample prepared from a living body.
EFFECT: improved methods of preparing and analysis.
13 cl, 9 dwg, 8 ex
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