Patent ID: 8404866

Claim:
A substituted heterocyclic mercaptosulfonamide corresponding to the formula: wherein A − is a counteranion; i is 0 or 1; k is an integer from 1 to 5, inclusive; R 2 is hydrogen, hydrocarbyl, substituted hydrocarbyl, or heterocyclo; R 3a and R 3b , when i is 1, are independently hydrogen, hydrocarbyl, or substituted hydrocarbyl; X 2 is —N(X 20 )— or —N + (X 26 )(X 27 )—A −; X 20 is hydrogen or acyl, X 26 and X 27 are independently hydrogen, hydrocarbyl, substituted hydrocarbyl, or, in combination with the nitrogen atom to which they are attached, form a heterocyclo ring; and each X 40 is independently hydrocarbyl, substituted hydrocarbyl, halo, amino, nitro, hydroxyl, alkoxy, acyl, or heterocyclo; wherein a substituted hydrocarbyl is a hydrocarbyl group substituted with at least one of a halogen, heterocyclo, alkoxy, alkenoxy, alkynoxy, aryloxy, hydroxy, keto, acyl, acyloxy, nitro, amino, amido, cyano, thiol, ketal, acetal, ester and ether.