Spiro compound and use thereof

A compound represented by formula (I), an optical isomer thereof or a pharmaceutically acceptable salt thereof,

• wherein
• each R1 is independently selected from the group consisting of H, F, Cl, Br, I, OH, NH2, and CN, or is independently selected from the group consisting of C1-6 alkyl and C1-6 heteroalkyl, each of which is optionally substituted by 1, 2 or 3 R;
• R2 is H, or is selected from the group consisting of C1-6 alkyl, C1-6 heteroalkyl and C3-6 cycloalkyl, each of which is optionally substituted by 1, 2 or 3 R;
• T is selected from the group consisting of N and CH;
• moiety
• is selected from the group consisting of
• moiety
• is selected from the group consisting of
• ring B is selected from the group consisting of phenyl and 5- to 6-membered heteroaryl;
• m is 1 or 2;
• n is 0, 1, 2 or 3;
• R is selected from the group consisting of F, Cl, Br, I, OH, NH2, CN, and COOH, or is selected from the group consisting of C1-6 alkyl, C1-6 alkoxy, N,N-di(C1-6 alkyl)amino, and C3-6 cycloalkyl;
• the heteroatom or the heteroatom group of the C1-6 heteroalkyl and the 5- to 6-membered heteroaryl is each independently selected from the group consisting of N, O, S, NH, —NHC(═O)—, —S(═O)— and —S(═O)2—;
• and
• the number of the heteroatom or the heteroatom group is 1, 2, 3 or 4.