Patent ID: 8703096

Claim:
A compound having the formula wherein: R 1 is a member selected from the group consisting of C 1 -C 6 alkyl and halo-substituted C 1 -C 6 alkyl, or aryl alkyl; R 2 is a member selected from the group consisting of H, C 1 -C 6 alkyl, halo-substituted C 1 -C 6 alkyl, halo, and C 1 -C 6 alkylthio, and R 3 is a member selected from the group consisting of H and C 1 -C 6 alkyl, or R 2 and R 3 are joined to form a thio-C 1 -C 3 alkylene linkage or alkylene linkage, and R 4 is a member selected from the group consisting of H and C 1 -C 3 alkyl, and R 5 is a member selected from the group consisting of H and C 1 -C 3 alkyl, or R 4 and R 5 are joined to form a C 1 -C 3 alkylenethio linkage or alkylene linkage.