| abstract |
1. Resorufin derivatives of the general formulae Ia and Ib see diagramm : EP0209875,P26,F3 in which R**1 , R**2 , R**3 , R**4 and R**5 , which in each case can be the same or different, signify hydrogen, halogen, a carboxyl, carboxamido, lower alkoxycarbonyl, cyano or nitro group, a lower alkyl or lower alkoxy radical, which in each case can be substituted by carboxyl, carboxamido, lower alkoxycarbonyl, cyano or nitro groups, whereby R**4 and R**5 can together represent an annellated benzene or naphthalene ring which is unsubstituted or carries one or more constituents selected from the group SO3 H, CO2 H or C1 -C5 -alkoxy, Z a bridge member, A the residue of a ligand and n a whole number of 1 to 200, whereby the lower alkyl and lower alkoxy groups contain hydrocarbon chains with 1 to 5 carbon atoms. |