The present invention relates to compounds which comprise a 4-substituted piperidine ring linked to a substituted or unsubstituted hydrocarbyl ring. The compounds, including all enatiomeric and diasteriomeric forms and pharmaceutically acceptable salts thereof, have the formula:
1
wherein preferably R is substituted aryl, W is a pendant unit having the formula:
-L-Q
L is a linking unit, Q is preferably a cyclic hydrocarbyl unit; W
1
is preferably a carbocyclic unit and W
2
is a heteroatom comprising unit.