| 主权项 |
1. A compound represented by the formula (I): wherein
R1 is (1) a 3- to 8-membered monocyclic non-aromatic heterocyclic group substituted by 1 to 3 radiolabeled halogen atoms, or (2) an amino group mono- or di-substituted by substituent(s) selected from
(a) a C1-6 alkyl group substituted by 1 to 3 radiolabeled halogen atoms, and(b) a radiolabeled C1-6 alkyl group, and optionally further substituted by a substituent selected from
(c) a C1-6 alkyl group substituted by 1 to 3 halogen atoms,(d) a C1-6 alkyl group optionally substituted by C6-14 aryl group(s) optionally substituted by 1 to 3 halogen atoms,(e) a C3-8 cycloalkyl group, and(f) a 3- to 8-membered monocyclic non-aromatic heterocyclic group;R2 is (1) a C6-14 aryl group optionally substituted by 1 to 3 halogen atoms, or (2) a 5- or 6-membered monocyclic aromatic heterocyclic group optionally substituted by 1 to 3 substituents selected from
(a) a halogen atom,(b) a C1-6 alkyl group, and(c) a C3-8 cycloalkyl group;X1 is CH or N; andRing A is or a salt thereof. |
