DIAGNOSTIC MEANS FOR EVIDENCE OF THE LEUCOSYTE IN THE BODY LIQUIDS

摘要

Diagnostic agent for the detection of leukocytes in body fluids, comprising an absorbent carrier which is impregnated with a chromogen and a buffer substance, wherein the chromogen is a sulfonphthalein ester of the formula wherein R1 is a carboxylic acid residue optionally substituted by halogen or lower alkoxy; or is an amino acid or peptide residue having a nitrogen protective group; R2 is a halogen atom or a lower alkyl radical; and R3 and R4 are individually selected from hydrogen and halogen. Certain of the chromogen are provided as novel compounds.