A compound of Formula I: or a pharmaceutically acceptable salt thereof, wherein: Ring A is a fused (5- to 6-membered)nitrogen-containing heteroaryl ring, and, where chemically permissible, A is optionally substituted with one to three R 8; R 1 is pyridinyl, pyrimidinyl, phenyl, or naphthyl, and, where chemically permissible, R 1 is optionally substituted with one to three R 9; R 2 is a (C 3 -C 8)cycloalkyl that is selected from the group consisting of cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cyclooctyl, optionally substituted with one to three R 8*; R 3a and R 4a are hydrogen or optionally substituted (C 1 -C 6)alkyl; when present, R 3b and R 4b are hydrogen; R 5 and R 6 at each occurrence are each independently selected from the group consisting of hydrogen and (C 1 -C 6)alkyl; R 7 is (C 1 -C 6)alkyl; when present, R 8 at each occurrence is independently selected from the group consisting of halogen, oxo, cyano, hydroxy, -SF 5, nitro, N(R 5)(R 6), optionally substituted (C 1 -C 6)alkylthio, optionally substituted (C 1 -C 6)alkyl, and optionally substituted (C 1 -C 6)alkoxy; when present, R 8* at each occurrence is independently selected from the group consisting of halogen, oxo, cyano, hydroxy, -SF 5, nitro, optionally substituted (C 1 -C 6)alkylthio, optionally substituted (C 1 -C 6)alkyl, and optionally substituted (C 1 -C 6)alkoxy when present, R 9 at each occurrence is independently selected from the group consisting of halogen, oxo, cyano, hydroxy, -SF 5, nitro, optionally substituted (C 1 -C 6)alkyl, optionally substituted (C 1 -C 6)alkylthio, optionally substituted (C 1 -C 6)alkoxy, -N(R 5)(R 6),-(SO 2)R 7, and -S(=O 2)N(R 5)(R 6); ------- is absent (forming a single bond) or a bond (forming a double bond); and n is an integer selected from 0 or 1, provided when ------ is present to form a double bond then n is 0, and when ------ is absent to form a single bond n is 1. Ring A is a fused (5- to 6-membered)nitrogen-containing heteroaryl ring, and, where chemically permissible, A is optionally substituted with one to three R 8; R 1 is pyridinyl, pyrimidinyl, phenyl, or naphthyl, and, where chemically permissible, R 1 is optionally substituted with one to three R 9; R 2 is a (C 3 -C 8)cycloalkyl that is selected from the group consisting of cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cyclooctyl, optionally substituted with one to three R 8*; R 3a and R 4a are hydrogen or optionally substituted (C 1 -C 6)alkyl; when present, R 3b and R 4b are hydrogen; R 5 and R 6 at each occurrence are each independently selected from the group consisting of hydrogen and (C 1 -C 6)alkyl; R 7 is (C 1 -C 6)alkyl; when present, R 8 at each occurrence is independently selected from the group consisting of halogen, oxo, cyano, hydroxy, -SF 5, nitro, N(R 5)(R 6), optionally substituted (C 1 -C 6)alkylthio, optionally substituted (C 1 -C 6)alkyl, and optionally substituted (C 1 -C 6)alkoxy; when present, R 8* at each occurrence is independently selected from the group consisting of halogen, oxo, cyano, hydroxy, -SF 5, nitro, optionally substituted (C 1 -C 6)alkylthio, optionally substituted (C 1 -C 6)alkyl, and optionally substituted (C 1 -C 6)alkoxy when present, R 9 at each occurrence is independently selected from the group consisting of halogen, oxo, cyano, hydroxy, -SF 5, nitro, optionally substituted (C 1 -C 6)alkyl, optionally substituted (C 1 -C 6)alkylthio, optionally substituted (C 1 -C 6)alkoxy, -N(R 5)(R 6),-(SO 2)R 7, and -S(=O 2)N(R 5)(R 6); ------- is absent (forming a single bond) or a bond (forming a double bond); and n is an integer selected from 0 or 1, provided when ------ is present to form a double bond then n is 0, and when ------ is absent to form a single bond n is 1.