for 6 large series of compounds derived from the piperidine moieties of spiperone , pimozide , haloperidol , pethidine , fentanyl and 4-methocarboxy-fentanyl , ic50 values were determined in the opiate and neuroleptic binding assay using [ 3h ] -fentanyl and [ 3h ] -haloperidol as ligands , respectively .
C0040615
neuroleptic
C0018546
haloperidol