盐酸丁螺环酮，即8-[4-[4-(2-嘧啶基)-1-哌嗪基]丁基]-8-氮杂螺[4，5]癸烷-7，9-二酮盐酸盐是重要的抗焦虑药。

• Buspirone hydrochloride, (8-[4-[4-(2-Pyrimidinyl)-l-piperazinyl] butyl]-8-Azaspiro [4,5]decane-7,9dione hydrochloride)is an effective anxiolytic drugs.