Anti-HCMV virus compound

A compound represented by formula (II), a pharmaceutically acceptable salt or a tautomer thereof,

• wherein,
• ring A is a 5-membered heteroaromatic ring;
• R1 is H or halogen, or 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 C1-6 alkoxy which is optionally substituted by 1, 2 or 3 R;
• R3 is H, or 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;
• T is N or C(R);
• n is 1 or 2;
• Ar is selected from the group consisting of phenyl and 6-membered heteroaryl, each of which is optionally substituted by 1, 2 or 3 R;
• R is H, F, Cl, Br, I, OH, CN, NH2 or C(═O)NH2, or 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′;
• R′ is F, Cl, Br, I, OH, CN, NH2, COOH, Me, Et, CF3, CHF2, CH2F, NHCH3 or N(CH3)2;
• the heteroatom or heteroatom group in the 5-membered heteroaromatic ring, 6-membered heteroaryl or C1-6 heteroalkyl is selected from the group consisting of —C(═O)NH—, —NH—, —S(═O)2NH—, —S(═O)NH, —O—, —S—, N, —C(═O)O—, —C(═O)—, —S(═O)— and —S(═O)2—;
• in any of the above cases, the number of the heteroatom or the heteroatom group is independently 1, 2 or 3.