Patent ID: 8076325

Claim:
A compound selected from those of formula (I): wherein: R 1 represents hydrogen, C 3 -C 7 cycloalkyl, benzyl or linear or branched C 1 -C 6 alkyl, wherein the alkyl group may be saturated or unsaturated and may be optionally substituted by a hydroxy or C 3 -C 7 cycloalkyl group or by one or more halogen atoms, R 2 , R 3 , R 4 and R 5 , which may be the same or different, each represent hydrogen; hydroxy; methyl; —OSO 2 R 10 ; —OCOR 10 ; or linear or branched, saturated or unsaturated C 1 -C 6 alkoxy which may be optionally substituted by a methoxy or —(CO)—NR 12 R′ 12 group, or R 2 and R 3 , or R 3 and R 4 , or R 4 and R 5 together form —O—(CH 2 ) q —O—, —O—CH═CH—O—or —O—CH═CH—, R 6 , R 7 , R 8 and R 9 , which may be the same or different, each represent hydrogen or linear or branched, saturated or unsaturated C 1 -C 6 alkoxy, or R 6 and R 7 , or R 7 and R 8 , or R 8 and R 9 together form —O—(CH 2 ) q —O—, R 10 represents linear or branched C 1 -C 6 alkoxy, NR 11 R′ 11 or linear or branched C 1 -C 6 alkyl which is optionally substituted by one or more halogen atoms, R 11 and R′ 11 , which may be the same or different, each represent hydrogen or linear or branched C 1 -C 6 alkyl, or R 11 and R′ 11 together with the nitrogen atom carrying them form a monocyclic or bicyclic, 5- to 8-membered, nitrogen-containing heterocycle optionally containing another hetero atom selected from O and N, said heterocycle being optionally substituted by one or more halogen atoms, R 12 and R′ 12 , which may be the same or different, each represent hydrogen or linear or branched C 1 -C 6 alkyl, X represents O, NH or CH 2 , m and p, which may be the same or different, each represent 0 or 1, n and q, which may be the same or different, each represent 1 or 2, its optical isomers and addition salts thereof with a pharmaceutically acceptable acid.