A compound represented by formula (Ia'), or a salt thereof: wherein: m is 1 and R 1a is selected from: - -S 2 R"' where R"' is C 1 -C 6 alkyl, or cycloalkyl, - -S 2 NR'R" where R' is hydrogen and R" is selected from hydrogen, C 1 -C 6 alkyl, -OH, or NH 2, - C 1 -C 6 alkyl, substituted 1 or 2 times with a substituent group selected from CF 3 and NH 2, - C 1 -C 6 haloalkyl, - optionally substituted 4 or 5-membered heterocyclyl, - -NR'S 2 NR'R' where each R' is independently selected from hydrogen or C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, heterocyclyl, or heteroaryl, and -NR'-S 2 R' where each R' is independently selected from hydrogen or C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, heterocyclyl, or heteroaryl; R 2 is selected from C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, phenyl, F, and Cl; R 3 is selected from hydrogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, F, Cl, and CN; or R 2 and R 3 together form C 4-9 cycloalkyl or C 4-9 cycloalkenyl; R 4 is selected from optionally substituted heteroaryl, optionally substituted heterocyclyl, and optionally substituted aryl; R 5 is hydrogen or C 1 -C 4 alkyl; and n is 1-3; wherein when R 2 and R 3 are hydrogen, and n is 1, R 1a is not optionally substituted 4 or 5-membered heterocyclyl. m is 1 and R 1a is selected from: - -S 2 R"' where R"' is C 1 -C 6 alkyl, or cycloalkyl, - -S 2 NR'R" where R' is hydrogen and R" is selected from hydrogen, C 1 -C 6 alkyl, -OH, or NH 2, - C 1 -C 6 alkyl, substituted 1 or 2 times with a substituent group selected from CF 3 and NH 2, - C 1 -C 6 haloalkyl, - optionally substituted 4 or 5-membered heterocyclyl, - -NR'S 2 NR'R' where each R' is independently selected from hydrogen or C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, heterocyclyl, or heteroaryl, and -NR'-S 2 R' where each R' is independently selected from hydrogen or C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, heterocyclyl, or heteroaryl; R 2 is selected from C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, phenyl, F, and Cl; R 3 is selected from hydrogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, F, Cl, and CN; or R 2 and R 3 together form C 4-9 cycloalkyl or C 4-9 cycloalkenyl; R 4 is selected from optionally substituted heteroaryl, optionally substituted heterocyclyl, and optionally substituted aryl; R 5 is hydrogen or C 1 -C 4 alkyl; and n is 1-3; - -S 2 R"' where R"' is C 1 -C 6 alkyl, or cycloalkyl, - -S 2 NR'R" where R' is hydrogen and R" is selected from hydrogen, C 1 -C 6 alkyl, -OH, or NH 2, - C 1 -C 6 alkyl, substituted 1 or 2 times with a substituent group selected from CF 3 and NH 2, - C 1 -C 6 haloalkyl, - optionally substituted 4 or 5-membered heterocyclyl, - -NR'S 2 NR'R' where each R' is independently selected from hydrogen or C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, heterocyclyl, or heteroaryl, and -NR'-S 2 R' where each R' is independently selected from hydrogen or C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, heterocyclyl, or heteroaryl; R 2 is selected from C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, phenyl, F, and Cl; R 3 is selected from hydrogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, F, Cl, and CN; or R 2 and R 3 together form C 4-9 cycloalkyl or C 4-9 cycloalkenyl; R 4 is selected from optionally substituted heteroaryl, optionally substituted heterocyclyl, and optionally substituted aryl; R 5 is hydrogen or C 1 -C 4 alkyl; and n is 1-3; -NR'-S 2 R' where each R' is independently selected from hydrogen or C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, heterocyclyl, or heteroaryl; R 2 is selected from C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, phenyl, F, and Cl; R 3 is selected from hydrogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, F, Cl, and CN; or R 2 and R 3 together form C 4-9 cycloalkyl or C 4-9 cycloalkenyl; R 4 is selected from optionally substituted heteroaryl, optionally substituted heterocyclyl, and optionally substituted aryl; R 5 is hydrogen or C 1 -C 4 alkyl; and n is 1-3; wherein when R 2 and R 3 are hydrogen, and n is 1, R 1a is not optionally substituted 4 or 5-membered heterocyclyl.