Boracic acid compound

A compound represented by Formula (II) or (II′) or a pharmaceutically acceptable salt thereof,

• wherein B is boron;
• T is —O—, —S—, or —Se—;
• each R1 is independently —OH or C1-3 alkoxy;
• R2 and R3 are each independently H or C1-3 alkyl, wherein the C1-3 alkyl is optionally substituted with 1, 2, or 3 substituents independently selected from F, Cl, Br, I, —OH, and —OCH3;
• R4 is H, F, Cl, Br, I, C1-3 alkyl, or C1-3 alkoxy, wherein the C1-3 alkyl and C1-3 alkoxy are each independently and optionally substituted with 1, 2, or 3 substituents independently selected from F, Cl, Br, I, −OH, and —OCH3;
• R5 is H, F, Cl, Br, I, or C1-3 alkoxy;
• R6 is H, F, Cl, Br, I, —ORa, or C1-3 alkyl, wherein the C1-3 alkyl is optionally substituted with 1, 2, or 3 substituents independently selected from F, Cl, Br, I, —OH, and —OCH3;
• or R5 and R6 together with the carbon atom to which they are attached form a 5-6-membered oxygen-containing non-aromatic heterocyclic ring, wherein the 5-6-membered oxygen-containing non-aromatic heterocyclic ring is optionally substituted with 1, 2, or 3 substituents independently selected from F, Cl, Br, I, −OH, and —OCH3;
• R7 is H, C1-3 alkyl, —C(Rb)2OC(═O)Rc, or —C(Rb)2OC(═O)ORc, wherein the C1-3 alkyl is optionally substituted with 1, 2, or 3 substituents independently selected from F, Cl, Br, I, —OH, and —OCH3;
• Ra is H, C1-6 alkyl,
• wherein the C1-6 alkyl,
• are each independently and optionally substituted with 1, 2, or 3 Ra1;
• each Rb is independently H or C1-3 alkyl;
• Rc is H, C1-3 alkyl,
• wherein the C1-3 alkyl,
• are each independently and optionally substituted with 1, 2, or 3 Rc1;
• each Ra1 is independently F, Cl, Br, I, C1-3 alkyl, C1-3 alkoxy,
• wherein the C1-3 alkyl, C1-3 alkoxy,
• are each independently and optionally substituted with 1, 2, or 3 R;
• each Rc1 is independently F, Cl, Br, I, —OH, C1-3 alkyl, or C1-3 alkoxy;
• and
• each R is independently F, Cl, Br, I, —OH, or C1-3 alkyl, wherein the C1-3 alkyl is optionally substituted with 1, 2, or 3 substituents independently selected from F, Cl, Br, I, and