Patent ID: 7223783

Claim:
A compound of formula (I) wherein: (i) R 1 represents a hydrogen atom or a (1–4C)alkyl group; and R 2 represents a group of formula -A 1 -NR 5 R 6 in which each of R 5 and R 6 independently represents a hydrogen atom or a (1–4C)alkyl group and A 1 represents (CH 2 ) m , (CH 2 ) n -A 2 -(CH 2 ) p or (CH 2 CH 2 O) q CH 2 CH 2 in which m is an integer of from 2 to 10, each of n and p is an integer of from 1 to 6, A 2 is CH═CH, phenylene, biphenylene, cyclohexylene or piperazinylene and q is 1, 2 or 3; (ii) R 1 and R 2 together represent -A 3 -NR 7 -A 4 - in which each of A 3 and A 4 independently represents (CH 2 ) r or (CH 2 CH 2 O) s CH 2 CH 2 in which r is an integer of from 2 to 6, s is 1, 2 or 3, and R 7 represents a hydrogen atom or a (1–4C)alkyl group; (iii) R 1 and R 2 together with the nitrogen atom to which they are attached represent a piperidinyl group, which piperidinyl group bears a substituent of formula -A 5 -R 8 at the 4 position, in which A 5 represents (1–4C)alkylene and R 8 represents piperidin-4-yl; or (iv) R 1 and R 2 together with the nitrogen atom to which they are attached represent a pyrrolidinyl, piperidinyl or morpholino group; and R 3 and R 4 each independently represents a hydrogen atom, a halogen atom, a (1–4C)alkyl group, a (1–4C)alkoxy group, a phenyl group which is unsubstituted or substituted by one or two substituents selected independently from a halogen atom, a (1–4C)alkyl group and a (1–4C)alkoxy group, a group of formula R 8 S(O) 2 NR 9 —, a group of formula R 10 N(R 11 )S(O) 2 —, a group of formula R 12 C(O)N(R 13 )— or a group of formula R 14 N(R 15 )C(O)— in which each of R 8 , R 10 , R 12 and R 14 independently represents a (1–4C)alkyl group or a phenyl group which is unsubstituted or substituted by one or two substituents selected independently from a halogen atom, a (1–4C)alkyl group and a (1–4C)alkoxy group, and each of R 9 , R 11 , R 13 and R 15 independently represents a hydrogen atom or a (1–4C)alkyl group; or a pharmaceutically-acceptable salt thereof.