| abstract |
Compounds of formula I, n wherein n R 1 represents C 1-4 alkoxy optionally substituted by one or more fluorine atoms; n R 2 represents H or C 1-6 alkoxy optionally substituted by one or more fluorine atoms; n R 3 represents a 5- or 6-membered heterocyclic ring, the ring being optionally substituted; n R 4 represents a 4-, 5-, 6-, or 7-membered heterocyclic ring, the ring being optionally fused to a benzene ring or 5- or 6-membered heterocyclic ring, the ring system as a whole being optionally substituted; n L is absent; n and pharmaceutically acceptable salts thereof; are useful in therapy, in particular in the treatment of benign prostatic hyperplasia. |