the effects of the pyrimidinyl-piperazines buspirone , gepirone , ipsapirone and their common metabolite 1- ( 2-pyrimidinyl ) -piperazine ( pmp ) as well as of 8-hydroxy-2- ( di-n-propylamino ) tetralin ( 8-oh-dpat ) and l-5-hydroxytryptophan ( l-5-htp ) were investigated in montgomery 's conflict test -- an animal anxiety model based on the animal 's inborn urge to explore a new environment and its simultaneous fear of elevated , open spaces .
C0031958
piperazines
C0006462
buspirone