Patent ID: 7652002

Claim:
A compound of formula (I): wherein: R represents hydrogen, halogen or C 1-6 alkyl; R 1 represents hydrogen, C 1 alkyl or together R 1 and R 3 represent a CH 2 moiety; R 2 represents hydrogen, —OC 1-6 alkyl, —O(O)C 1-6 alkyl or hydroxy; R 3 represents hydrogen, hydroxy or together R 3 and R 1 represent a CH 2 moiety; R 4 represents hydrogen or C 1-6 alkyl; R 5 represents hydrogen, C 1-6 alkyl or C 1-6 alkoxycarbonyl; X represents NRxRy; Rx and Ry represent —C 1-6 alkylheterocycle or together Rx and Ry form a heterocycle; and pharmaceutically acceptable salts thereof.