A compound having formula (I-A), or a pharmaceutically acceptable salt thereof: wherein: X' is S; X'" is unsubstituted phenyl, X" is H or C 1 -C 4 alkyl; R 2 is: • C 1 -C 4 alkyl; or • phenyl that is optionally substituted with from 1-4 R e; or • heteroaryl containing from 5-6 ring atoms, wherein from 1-4 of the ring atoms is independently selected from N, NH, N(C 1 -C 3 alkyl), NC (C 1 -C 6 alkyl), O, and S; and wherein said heteroaryl is optionally substituted with from 1-3 R e; R 12 is: • C 2 -C 6 alkoxy that is optionally substituted with -NH 2; or • heterocyclyl containing from 5-7 ring atoms, wherein from 1-2 of the ring atoms of the heterocyclyl is independently selected from N, NH, N(C 1 -C 6 alkyl), NC (C 1 -C 6 alkyl), NC O(C 1 -C 6 alkyl), O, and S; and each of which is optionally substituted with from 1-3 independently selected C 1 -C 4 alkyl groups; each of R 13 and R 14 is H; and each occurrence of R e is, independently, halo; cyano; -C (C 1 -C 6 alkyl); C OH; - C O(C 1 -C 6 alkyl); -NH 2; -NH(C 1 -C 6 alkyl), N(C 1 -C 6 alkyl) 2, -NHC (C 1 -C 6 alkyl), C 1 -C 6 alkoxy; C 1 -C 6 haloalkoxy; C 1 -C 6 thioalkoxy; C 1 -C 6 thiohaloalkoxy; C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl; or C 1 -C 6 haloalkyl; provided that R 12 cannot be -OCH 2 CH 3 when R 2 is unsubstituted phenyl or CH 3. X' is S; X'" is unsubstituted phenyl, X" is H or C 1 -C 4 alkyl; R 2 is: • C 1 -C 4 alkyl; or • phenyl that is optionally substituted with from 1-4 R e; or • heteroaryl containing from 5-6 ring atoms, wherein from 1-4 of the ring atoms is independently selected from N, NH, N(C 1 -C 3 alkyl), NC (C 1 -C 6 alkyl), O, and S; and wherein said heteroaryl is optionally substituted with from 1-3 R e; • C 1 -C 4 alkyl; or • phenyl that is optionally substituted with from 1-4 R e; or • heteroaryl containing from 5-6 ring atoms, wherein from 1-4 of the ring atoms is independently selected from N, NH, N(C 1 -C 3 alkyl), NC (C 1 -C 6 alkyl), O, and S; and wherein said heteroaryl is optionally substituted with from 1-3 R e; R 12 is: • C 2 -C 6 alkoxy that is optionally substituted with -NH 2; or • heterocyclyl containing from 5-7 ring atoms, wherein from 1-2 of the ring atoms of the heterocyclyl is independently selected from N, NH, N(C 1 -C 6 alkyl), NC (C 1 -C 6 alkyl), NC O(C 1 -C 6 alkyl), O, and S; and each of which is optionally substituted with from 1-3 independently selected C 1 -C 4 alkyl groups; • C 2 -C 6 alkoxy that is optionally substituted with -NH 2; or • heterocyclyl containing from 5-7 ring atoms, wherein from 1-2 of the ring atoms of the heterocyclyl is independently selected from N, NH, N(C 1 -C 6 alkyl), NC (C 1 -C 6 alkyl), NC O(C 1 -C 6 alkyl), O, and S; and each of which is optionally substituted with from 1-3 independently selected C 1 -C 4 alkyl groups; each of R 13 and R 14 is H; and each occurrence of R e is, independently, halo; cyano; -C (C 1 -C 6 alkyl); C OH; - C O(C 1 -C 6 alkyl); -NH 2; -NH(C 1 -C 6 alkyl), N(C 1 -C 6 alkyl) 2, -NHC (C 1 -C 6 alkyl), C 1 -C 6 alkoxy; C 1 -C 6 haloalkoxy; C 1 -C 6 thioalkoxy; C 1 -C 6 thiohaloalkoxy; C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl; or C 1 -C 6 haloalkyl; provided that R 12 cannot be -OCH 2 CH 3 when R 2 is unsubstituted phenyl or CH 3.