Patent ID: 7439255

Claim:
A compound having structure I as indicated below: wherein: R1 − represents an anion associated with the positive charge of the N atom; and R2 is phenyl; R3 is selected from the group consisting of —(C 2 -C 6 )alkenyl, —(C 1 -C 6 )alkyl(C 3 -C 6 )cycloalkyl, —(C 1 -C 6 )alkyl-phenyl, —(C 1 -C 6 )alkyl-OH, —(C 1 -C 6 )alkyl-CN, —(C 1 -C 6 )alkyl-halogen, —(C 1 -C 6 )alkyl-CF 3 , —(C 1 -C 6 )alkyl-OCH 3 , —(C 1 -C 6 )alkyl-O—(C 1 -C 6 )alkyl-OCH 3 and —(C 1 -C 6 )alkyl-O—(C 1 -C 6 )alkyl-aryl.