Patent ID: 6921758

Claim:
A compound of formula I, wherein p and q independently represent 0 R 1 represents H; R 2 represents H; R 3 represents phenyl (which latter group is substituted by one or more of C 1-4 alkyl, C 1-4 alkoxy, halo, hydroxy, cyano, nitro, methylenedioxy, trifluoromethyl, N(H)R 27 or C(O)OR 28 ); R 27 represents H, C 1-4 alkyl or C(O)R 29 ; R 28 and R 29 independently represent H or C 1-4 alkyl; R 4 represents H or C 1-4 alkyl; Y represents C 1-3 alkylene optionally substituted by C 1-4 alkyl, hydroxy, methylene or oxo; n represents 1, and B represents a structural fragment of formula IVa wherein R 5 represents H, halo or C 1-4 alkyl; or a pharmaceutically acceptable salt thereof.