Patent ID: 6949530

Claim:
A compound of Formula (I): wherein R 1 is an unsubstituted or substituted C 1-12 straight chain alkyl, an unsubstituted or substituted C 3-12 branched chain alkyl, an unsubstituted or substituted C 2-12 straight chain alkenyl, an unsubstituted or substituted C 3-12 branched chain alkenyl, an unsubstituted or substituted C 1-12 alkoxy, halo, an unsubstituted or substituted benzyl, an unsubstituted or substituted phenyl, amino, an unsubstituted or substituted C 1-12 dialkylamino, an unsubstituted or substituted C 6-30 diarylamino, an unsubstituted or substituted tolyl, xylyl, anisyl, mesityl, an unsubstituted or substituted C 1-12 alkylthio, an unsubstituted or substituted C 1-12 alkyloxy, an unsubstituted or substituted phenoxy, an unsubstituted or substituted benzyloxy, or nitro; R 2 , R 3 , and R 4 are selected from the group consisting of hydrogen, an unsubstituted or substituted C 1-12 straight chain alkyl, an unsubstituted or substituted C 3-12 branched chain alkyl, an unsubstituted or substituted C 2-12 straight chain alkenyl, an unsubstituted or substituted C 3-12 branched chain alkenyl, an unsubstituted or substituted C 3-8 cycloalkyl, benzyl or substituted benzyl, and phenyl or substituted phenyl; M +x is Na, x is 1, a is 1, and b is 2.