Patent ID: 7879902

Claim:
A compound of formula (IIa): in which: X represents a halogen atom or a hydroxyl, (C 1 -C 4 )alkoxy or benzyloxy group; R 3 is a halogen atom, a (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy or trifluoromethyl group or a group S(O) n Alk; R 4 , R 5 , R 6 , R 7 and R 8 represent, independently of each other, a hydrogen or halogen atom, a (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy or trifluoromethyl group or a group S(O) n Alk; R 9 represents a (C 1 -C 4 )alkyl; Alk represents a (C 1 -C 4 )alkyl; and n represents 0, 1 or 2.