Patent ID: 7029886

Claim:
An enzymatic substrate of general formula (I): in which X represents a nitrogen atom or a carbon atom substituted with a phenyl group, said phenyl group optionally being substituted in the meta or para position, Y and Z represent a hydrogen atom when X represents a carbon atom, or Y and Z together represent an ether, thioether or amine bond optionally substituted with an alkyl or aryl group, R 1 and R 2 each represent, independently of one another, H, Cl, F, I or Br, and may be identical or different, or R 1 and R 2 together represent a fused benzene ring which may or may not be substituted, R 3 and R 4 each represent, independently of one another, H, Cl, F, I or Br and may be identical or different, and R represents a group such that the O—R bond can be hydrolyzed by an enzyme, wherein R is selected from the group consisting of an α- or β-sugar-type residue, a phosphate, and a sulfate.