| abstract |
The present invention provides compounds of formula (I), wherein R, R, R, R, R, R, X, and L have any meanings as defined herein, and pharmaceutically acceptable salts thereof, useful as agents in the treatment of disorders and conditions of a central nervous system, including attention deficit hyperactivity disorder, neuropathic pain, urinary incontinence, anxiety, depression, schizophrenia and fibromyalgia. Also provided are pharmaceutical compositions containing one or more than one of the compounds of formula (I) |