Patent ID: 6603014
Filing Date: 2003-08-05
Classification: A61K,A61Q

Abstract:
A compound of the formula V in which X is the divalent radical of oxygen, sulfur or the radical and R1 and R2 independently of one another are CN or alkoxycarbonyl having from 2 to carbon atoms which can be substituted by a radical â€”(CH2)nâ€”SO3â€”M+, R3 is hydrogen, methyl or â€”(CH2)nâ€”SO3â€”M+, and R4 is hydrogen or one or more identical or different radicals C1- to C8-alkyl, C1- to C8-alkoxy or the radical â€”SO3â€”M+, where in each case n is the number 2 or 3 and M+ is a cation chosen from the group consisting of in which R5, R6 and R7 are hydrogen or low molecular weight alkyl or hydroxyalkyl, and metal cations, with the proviso that the compound of the formula V has at least one radical â€”(CH2)nSO3â€”M+ or â€”SO3â€”M+.