Synonyms: 4,7-Etheno-1H-cyclobut[f]isoindole-1,3(2H)-dione,3a,4,4a,6a,7,7a-hexahydro-2-[4-[4-(2-pyrimidinyl)-1-piperazinyl]butyl]-,monohydrochloride, (3aa,4b,4aa,6aa,7b,7aa)-; Wy 47846 hydrochloride; Wy 47846monohydrochloride; Wy 47846HCl; Zalospirone hydrochloride