Patent ID: 8383647

Claim:
A compound represented by the formula (I): wherein ring A is a tetrahydrofuran ring optionally further substituted; R 1 is a hydrogen atom or a halogen atom; R 2 is a hydrogen atom, a halogen atom or a C 1-6 alkyl group; R 3 is a hydrogen atom or a C 1-6 alkyl group; and R 4 and R 5 (1) are each independently a hydrogen atom, an optionally substituted C 1-6 alkyl group, an optionally substituted C 3-10 cycloalkyl group, or an optionally substituted 5- or 6-membered heterocyclic group, or (2) may form, together with the adjacent nitrogen atom, substituted 4- to 6-membered nitrogen-containing heterocycle, provided that when one of R 4 and R 5 is a hydrogen atom, then the other is not a group represented by the formula: —X 1 —R A1 wherein X 1 is a bond or a C 1-6 alkylene group; and R A1 is a group represented by the formula: —Y—S(O) m1 —R B1 wherein Y is a bond or NH; m1 is an integer of 1 or 2; and R B1 is a C 1-6 alkyl group optionally substituted by 1 to 3 halogen atoms, or a cyclic group represented by the formula: wherein m2, m3, m4, n1, n2 and n3 are each independently an integer of 1 or 2; and R B2 is a C 1-6 alkyl group optionally substituted by 1 to 3 halogen atoms, (the ring moiety of the cyclic group is optionally further substituted), or a salt thereof.