Patent ID: 7381846

Claim:
A compound of the formula (I): in which R 1a and R 1b are independently a hydrogen atom; a primary or secondary alkyl group having from one to eight carbon atoms; or a primary, secondary, or tertiary alkyl group having two to eight carbon atoms and at least one ether linkage; and R 2a , R 2b , and R 3 are independently a hydrogen atom; a halogen atom; a primary, secondary, or tertiary alkyl group having from one to eight carbon atoms; or a primary, secondary, or tertiary alkyl group having two to eight carbon atoms and at least one ether linkage; and wherein, when R 3 is a hydrogen atom, at least two of R 1a , R 1b , R 2a , and R 2b each is independently a halogen atom; a primary, secondary, or tertiary alkyl group having from one to eight carbon atoms; or a primary, secondary, or tertiary alkyl group having two to eight carbon atoms and at least one ether linkage; or, at least one of R 1a , R 1b , R 2a , and R 2b is a primary, secondary, or tertiary alkyl group having two to eight carbon atoms and at least one ether linkage; and wherein, when R 3 is a primary alkyl group having one to eight carbon atoms, at least one of R 1a , R 1b , R 2a , and R 2b is a halogen atom; a primary, secondary, or tertiary alkyl group having from one to eight carbon atoms; or a primary, secondary, or tertiary alkyl group having two to eight carbon atoms and at least one ether linkage; and wherein, when at least two of R 2a , R 2b , and R 3 are tertiary alkyl groups, the tertiary alkyl groups are non-adjacent.