Patent ID: 6528652
Filing Date: 2003-03-04
Classification: C12Q,G01N

Abstract:
A composition comprising:(a) a compound of the formula or a salt or solvated salt thereof, whereinA is an N-blocked amino acid-residue or N-blocked peptide chain; and R1 and R2 are each independently hydrogen, unsubstituted or substituted aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted alkyl, unsubstituted or substituted alkenyl, unsubstituted or substituted alkoxy, amino, unsubstituted or substituted acyl, halo, nitro, cyano, â€”SO3H, or hydroxy, wherein R1 and R2 are not both hydrogen; and (b) a diazonium salt wherein the compound of formula I and the diazonium salt are each independently present in amounts effective to detect the presence of leukocytes in urine.