Patent ID: 6979575

Claim:
A colored and fluorescent marker dye having an absorption maximum between 420 and 950 nm of formula: in which R represents H or an organic substituent or ring R 1 or R 4 can represent H, an optionally substituted linear, branched or cyclic, saturated or unsaturated alkyl residue or an optionally substituted aryl residue, R 2 to R 4 can also represent a halogen, cyano or optionally substituted amino group, R and R 1 to R 4 can also optionally be linked together by means of carbocyclic or heterocyclic rings; Z represents a divalent aromatic or heteroaromatic residue which can also contain a residue R as defined above, n can have a value between 0 and 3 and at least one residue R or R 1 to R 4 contains a group which enables a biomolecule or a particle to be labeled.