Patent ID: 6949250

Claim:
A compound selected from the group consisting of: wherein R 1 is hydrogen or methyl; R 2 , R 3 and R 4 are independently selected from hydrogen, methyl and ethyl; n is 1-6; and wherein the compound is a free amine or environmentally acceptable acid amine salt; wherein R 1 is hydrogen or methyl, R 2 , and R 3 are independently selected from hydrogen, methyl, ethyl, straight-chain alkyl group having 3 to 8 carbon atoms and cyclic alkyl group having 3 to 6 carbon atoms, and wherein the compound is a free amine or environmentally acceptable acid amine salt, with the proviso that not both R 2 and R 3 are hydrogen; and wherein R 1 and R 2 are independently selected from methyl, ethyl, straight-chain alkyl group having 3 to 8 carbon atoms and cyclic alkyl group having 3 to 6 carbon atoms, and wherein the compound is a free amine or environmentally acceptable acid amine salt.