| abstract |
The present invention provides coupounds of formula (I): wherein R1, R2, R3, R4, R5, R6, X, ---, m, and n have any of the values defined in the specification, as well as pharmaceutical compositions comprising the compoun ds or salts thereof. The invention also provides therapeutic methods as well as processes and intermediates useful for preparing compounds of formula (I). T he compounds are useful as 5-HT ligands. |