Disclosed are compounds of Formula (I):
##STR1##
wherein R1-R4, p and q have any of the values described
in the specification, as well as pharmaceutical salts thereof, and pharmaceutical
compositions containing such compounds or salts. The compounds and salts are 5-HT
ligands and are useful for treating diseases, disorders, and/or conditions in a
mammal wherein activity of a 5-HT receptor is implicated. The compounds and salts
are particularly useful for treating diseases of the central nervous system.
