A compound having Formula II: or a pharmaceutically acceptable salt thereof, wherein: ring A' is selected from phenyl, pyrimidin-2-yl, pyrimidin-4-yl, pyrimidin-5-yl, oxazol-4-yl, isoxazol-3-yl, thiazol-2-yl, pyridin-3-yl and pyridin-2-yl, wherein ring A' is optionally substituted with one or two substituents independently selected from 1-propenyl, -cyclopropyl-OH, chloro, fluoro, -CF 3, -CHF 2, -CH 3, -CH 2 CH 3, -CF 2 CH 3, - S CH 3, -S 2 CH 3, -CH 2 OH, -CH CH 3, -CH CF 3, -OH, -OCH 3, -OCF 3, -OCH 2 CH 3, -C -NH 2, -CH 2 NH 2, -NH 2, -NH(CH 3), -CN and -N(CH 3) 2; and ring B' is selected from phenyl, pyridin-3-yl, pyridin-4-yl, pyridazin-4-yl, isoxazol-4-yl, isoxazol-3-yl, thiazol-5-yl, pyrimidin-5-yl and pyrazol-4-yl, wherein ring B' is optionally substituted with one to two substituents independently selected from halo; -CN; -OH; C 1 -C 4 alkyl optionally substituted with halo, CN or -OH; -S 2 -C 1 -C 4 alkyl; -S -C 1 -C 4 alkyl; -S 2 -NH-C 1 -C 4 alkyl; -S 2 -NH-CH 2 -CF 3; -S 2 -N(C 1 -C 4 alkyl) 2; -S 2 -azetidin-1-yl; -O-C 1 -C 4 alkyl; -CH 2 -O-CH 3, morpholin-4-yl, cyclopropyl, -cyclopropyl-C 1 -C 4 alkyl, -cyclopropyl-C 1 -C 4 alkoxy, cyclopropyl-CN, -S 2 -NH-cyclopropyl; -S 2 -NH-CH 2 -cyclopropyl; -C -C 1 -C 4 alkyl, -C -O-CH 3; wherein: a. ring A' and ring B' are not both an optionally substituted phenyl; b. when ring A' is unsubstituted pyridyl, then ring B' is not phenyl optionally substituted with one to two groups independently selected from methyl, ethyl, t-butyl, methoxy, CH CH 3, Cl, Br, and CF 3; c. when ring A' is a 5-membered heteroaryl, then ring B' is not phenyl optionally substituted with one to two groups independently selected from F, Cl, SO 2 CH 3, C OCH 3, methyl, ethyl, t-butyl, methoxy, ethoxy, CF 3, and OH; d. the compound is not: 6-(6-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine; or 6-(2-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine. ring A' is selected from phenyl, pyrimidin-2-yl, pyrimidin-4-yl, pyrimidin-5-yl, oxazol-4-yl, isoxazol-3-yl, thiazol-2-yl, pyridin-3-yl and pyridin-2-yl, wherein ring A' is optionally substituted with one or two substituents independently selected from 1-propenyl, -cyclopropyl-OH, chloro, fluoro, -CF 3, -CHF 2, -CH 3, -CH 2 CH 3, -CF 2 CH 3, - S CH 3, -S 2 CH 3, -CH 2 OH, -CH CH 3, -CH CF 3, -OH, -OCH 3, -OCF 3, -OCH 2 CH 3, -C -NH 2, -CH 2 NH 2, -NH 2, -NH(CH 3), -CN and -N(CH 3) 2; and ring B' is selected from phenyl, pyridin-3-yl, pyridin-4-yl, pyridazin-4-yl, isoxazol-4-yl, isoxazol-3-yl, thiazol-5-yl, pyrimidin-5-yl and pyrazol-4-yl, wherein ring B' is optionally substituted with one to two substituents independently selected from halo; -CN; -OH; C 1 -C 4 alkyl optionally substituted with halo, CN or -OH; -S 2 -C 1 -C 4 alkyl; -S -C 1 -C 4 alkyl; -S 2 -NH-C 1 -C 4 alkyl; -S 2 -NH-CH 2 -CF 3; -S 2 -N(C 1 -C 4 alkyl) 2; -S 2 -azetidin-1-yl; -O-C 1 -C 4 alkyl; -CH 2 -O-CH 3, morpholin-4-yl, cyclopropyl, -cyclopropyl-C 1 -C 4 alkyl, -cyclopropyl-C 1 -C 4 alkoxy, cyclopropyl-CN, -S 2 -NH-cyclopropyl; -S 2 -NH-CH 2 -cyclopropyl; -C -C 1 -C 4 alkyl, -C -O-CH 3; wherein: a. ring A' and ring B' are not both an optionally substituted phenyl; b. when ring A' is unsubstituted pyridyl, then ring B' is not phenyl optionally substituted with one to two groups independently selected from methyl, ethyl, t-butyl, methoxy, CH CH 3, Cl, Br, and CF 3; c. when ring A' is a 5-membered heteroaryl, then ring B' is not phenyl optionally substituted with one to two groups independently selected from F, Cl, SO 2 CH 3, C OCH 3, methyl, ethyl, t-butyl, methoxy, ethoxy, CF 3, and OH; d. the compound is not: 6-(6-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine; or 6-(2-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine. a. ring A' and ring B' are not both an optionally substituted phenyl; b. when ring A' is unsubstituted pyridyl, then ring B' is not phenyl optionally substituted with one to two groups independently selected from methyl, ethyl, t-butyl, methoxy, CH CH 3, Cl, Br, and CF 3; c. when ring A' is a 5-membered heteroaryl, then ring B' is not phenyl optionally substituted with one to two groups independently selected from F, Cl, SO 2 CH 3, C OCH 3, methyl, ethyl, t-butyl, methoxy, ethoxy, CF 3, and OH; d. the compound is not: 6-(6-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine; or 6-(2-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine. 6-(6-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine; or 6-(2-methoxy-3-pyridinyl)-N 2 -(4-methylphenyl)-1,3,5-triazine-2,4-diamine.