A series of 5, 6, 7, 8-tetrahydro-4 (3H)-quinazolinones substituted at the 3-position with 4- benzoyl-1-ethylpiperidine, 4-(4-fluorobenzoyl)-1-ethylpiperidine, 4-[bis-(4-fluorophenyl) methylene]-1-ethylpiperidine, or 4-(4-fluorophenyl)-1-propylpiperazine have been prepared and evaluated in binding assays to determine their affinity at serotonin 5-HT2A receptors as well as in a functional test, ie, wet dog shakes (WDS) induced by L-5-hydroxytryptophan (L ...