Patent ID: 6552199
Filing Date: 2003-04-22
Classification: C09B,G01N

Abstract:
A compound of the formula: wherein R1, R2, R3, R4 and R5 are selected from the group consisting of hydrogen, alkyl, aryl, heteroaryl, alkoxy, cyano, hydroxy, halogen, isocyanate, isothiocyanate, carboxylic acid, sulfonic acid, and derivatives of carboxylic acid or sulfonic acid selected from the group consisting of alkoxycarbonyl, aryloxycarbonyl, N-hydroxysuccinimide esters, acid halogenides, unsubstituted amino and substituted amino selected from the group consisting of &ohgr;-amino alcohols, &ohgr;-aminocarboxylic acids and &ohgr;-aminohalogen alkanes, with the proviso that at least one of R1, R2, R3, R4 and R5 is a carboxylic acid or derivative thereof,R6, R7, R8, R9, R10 and R11 are selected from the group consisting of hydrogen, alkyl, substituted alkyl, and halogen, and X is selected from the group consisting of amines, substituted amines, heteroarylidenecyanomethine residues, and malonic acid derivatives selected from the group consisting of 2-propyldinitril residues and cyanoacetic acid esters; Y is selected from the group consisting of heteroarylidenecyanomethine residues, and malonic acid derivatives selected from the group consisting of 2-propyldinitril residues and cyanoacetic acid esters.