A compound of Formula II: or a pharmaceutically acceptable salt thereof; wherein: B' is the same as B; B and B' are each: R 1 is independently selected at each occurrence from halogen, hydroxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, aryl, heteroaryl, thiol, thioalkyl, -(C=O)R S, -O(C=O)R S, cyano, -SO 3 H, - (P=O) 2, -O(P=O) 2, and nitro; R 2 and R 2 are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 3 is independently selected at each occurrence from halogen, alkyl, haloalkyl, aryl, heteroaryl, and R 5 and R 5' are independently selected from hydrogen, halogen, hydroxyl, alkyl, haloalkyl, aryl, and heteroaryl; R 5" is selected from hydrogen, alkyl, aryl, and heteroaryl; R 6 and R 6' are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 7 is independently selected at each occurrence from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 8 and R 8' are independently selected from alkyl and aryl; R 9 is selected from alkyl, haloalkyl, aryl, and heteroaryl; R 10 and R 10' are independently selected from alkyl, aryl, and heteroaryl; R 11 is selected from hydrogen, halogen, alkyl, haloalkyl, aryl, and heteroaryl: R 12 is selected from hydrogen, halogen, alkyl, haloalkyl, aryl, and heteroaryl; R 13 and R 13' are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 14 is selected from hydrogen, alkyl, aryl, and heteroaryl; R S is selected from hydrogen, alkyl, haloalkyl, alkoxy, amino, alkylamino, dialkylamino, aryl, and heteroaryl; X 1 is -C(R 5)(R 5')-, -N(R 5")-, -O-, or -S-; m is independently selected from 0, 1, 2, 3, or 4; n is independently selected at each occurrence from 0, 1, 2, 3, 4, and 5; and o is selected from 1, 2, 3, or 4. or a pharmaceutically acceptable salt thereof; wherein: B' is the same as B; B and B' are each: R 1 is independently selected at each occurrence from halogen, hydroxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, aryl, heteroaryl, thiol, thioalkyl, -(C=O)R S, -O(C=O)R S, cyano, -SO 3 H, - (P=O) 2, -O(P=O) 2, and nitro; R 2 and R 2 are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 3 is independently selected at each occurrence from halogen, alkyl, haloalkyl, aryl, heteroaryl, and R 5 and R 5' are independently selected from hydrogen, halogen, hydroxyl, alkyl, haloalkyl, aryl, and heteroaryl; R 5" is selected from hydrogen, alkyl, aryl, and heteroaryl; R 6 and R 6' are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 7 is independently selected at each occurrence from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 8 and R 8' are independently selected from alkyl and aryl; R 9 is selected from alkyl, haloalkyl, aryl, and heteroaryl; R 10 and R 10' are independently selected from alkyl, aryl, and heteroaryl; R 11 is selected from hydrogen, halogen, alkyl, haloalkyl, aryl, and heteroaryl: R 12 is selected from hydrogen, halogen, alkyl, haloalkyl, aryl, and heteroaryl; R 13 and R 13' are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 14 is selected from hydrogen, alkyl, aryl, and heteroaryl; R S is selected from hydrogen, alkyl, haloalkyl, alkoxy, amino, alkylamino, dialkylamino, aryl, and heteroaryl; X 1 is -C(R 5)(R 5')-, -N(R 5")-, -O-, or -S-; m is independently selected from 0, 1, 2, 3, or 4; n is independently selected at each occurrence from 0, 1, 2, 3, 4, and 5; and o is selected from 1, 2, 3, or 4. B' is the same as B; B and B' are each: R 1 is independently selected at each occurrence from halogen, hydroxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, aryl, heteroaryl, thiol, thioalkyl, -(C=O)R S, -O(C=O)R S, cyano, -SO 3 H, - (P=O) 2, -O(P=O) 2, and nitro; R 2 and R 2 are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 3 is independently selected at each occurrence from halogen, alkyl, haloalkyl, aryl, heteroaryl, and R 5 and R 5' are independently selected from hydrogen, halogen, hydroxyl, alkyl, haloalkyl, aryl, and heteroaryl; R 5" is selected from hydrogen, alkyl, aryl, and heteroaryl; R 6 and R 6' are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 7 is independently selected at each occurrence from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 8 and R 8' are independently selected from alkyl and aryl; R 9 is selected from alkyl, haloalkyl, aryl, and heteroaryl; R 10 and R 10' are independently selected from alkyl, aryl, and heteroaryl; R 11 is selected from hydrogen, halogen, alkyl, haloalkyl, aryl, and heteroaryl: R 12 is selected from hydrogen, halogen, alkyl, haloalkyl, aryl, and heteroaryl; R 13 and R 13' are independently selected from hydrogen, alkyl, haloalkyl, aryl, and heteroaryl; R 14 is selected from hydrogen, alkyl, aryl, and heteroaryl; R S is selected from hydrogen, alkyl, haloalkyl, alkoxy, amino, alkylamino, dialkylamino, aryl, and heteroaryl; X 1 is -C(R 5)(R 5')-, -N(R 5")-, -O-, or -S-; m is independently selected from 0, 1, 2, 3, or 4; n is independently selected at each occurrence from 0, 1, 2, 3, 4, and 5; and o is selected from 1, 2, 3, or 4.