to an acyclic carbon atom of a hydrocarbon radical substituted by carboxyl groups

Full Title

Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups > Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups > having the sulfur atom of at least one of the sulfonamide groups bound to a carbon atom of a six-membered aromatic ring > having sulfur atoms of sulfonamide groups and amino groups bound to carbon atoms of six-membered rings of the same carbon skeleton > having the nitrogen atom of at least one of the sulfonamide groups bound to hydrogen atoms or to an acyclic carbon atom > to an acyclic carbon atom of a hydrocarbon radical substituted by carboxyl groups