a compound according to embodiment 21 wherein r 6 is trifluoromethyl embodiment 25 a compound according to embodiment 21 wherein r 6 is hydrogen embodiment 26 a compound according to embodiment 21 wherein r 6 is methyl embodiment 27 a compound according to embodiment 26 wherein r 3 is methyl embodiment 28 a compound according to embodiment 10 wherein w is u2550 c r 5 u2014 embodiment 29 a compound according to embodiment 28 wherein r 5 is selected from the group consisting of halogen u2014 c 1 c 6 alkyl trihalomethyl and u2014 c 3 c 6 cycloalkyl embodiment 30 a compound according to embodiment 29 wherein r 5 is halogen embodiment 31 a compound according to embodiment 29 wherein r 5 is chloro embodiment 32 a compound according to embodiment 29 wherein r 7 is halogen embodiment 33 a compound according to embodiment 29 wherein r 7 is chloro embodiment 34 a compound according to embodiment 29 wherein r 5 is trifluoromethyl embodiment 35 a compound according to embodiment 29 wherein r 5 is hydrogen embodiment 36 a compound according to embodiment 29 wherein r 5 is methyl embodiment 37 a compound according to embodiment 10 wherein u is u2550 c r 3 u2014 embodiment 38 a compound according to embodiment 37 wherein r 3 is selected from the group consisting of hydrogen halogen u2014 c 1 c 6 alkyl trihalomethyl and u2014 c 3 c 6 cycloalkyl embodiment 39 a compound according to embodiment 38 wherein r 3 is halogen embodiment 40 a compound according to embodiment 38 wherein r 3 is chloro embodiment 41 a compound according to embodiment 38 wherein r 3 is trifluoromethyl embodiment.