Patent ID: 7250439

Claim:
A compound of formula (Ia): wherein: T is absent or represents O, S, NR 17 or CR 17 R 18 ; — represents optional bonds; R 15 and R 16 each independently represents halo, cyano, nitro, OR 17 , SR 17 , COR 17 , NR 18 COR 17 , CONR 17 R 18 , optionally substituted phenoxy or C 1-6 alkyl optionally substituted by OR 17 ; R 17 represents H, C 1-6 alkyl or C 1-4 alkylaryl; R 18 represents H or C 1-6 alkyl; m and n each independently represents 0 or an integer 1, 2 or 3; with the proviso that when T is absent, R 15 does not represent NR 18 COR 17 or CONR 17 R 18 in the ortho position; and physiologically functional derivatives thereof.