Excellent tachykinin receptor antagonistic activity is provided by 2-phenylpiperazine derivatives. The piperazine derivatives exhibit a strong inhibitory action against a tachykinin-induced increase of vascular permeability in in vivo tests. Moreover, the derivatives show a preferred transfer into blood, a long half-life in blood in pharmacokinetic tests of oral administration to rats or guinea pigs, and are very stable in blood plasma of various animals. Consequently, a piperazine derivative of the present invention is very useful as a tachykinin antagonist.
2-苯基哌嗪衍
生物具有优异的
缓激肽受体拮抗活性。这些
哌嗪衍
生物在体内测试中表现出强烈的抑制作用,可以抵抗
缓激肽诱导的血管通透性增加。此外,这些衍
生物在药代动力学测试中表现出有利的血液转移性和长半衰期,经口给大鼠或豚鼠,它们在血液中非常稳定。因此,本发明的
哌嗪衍
生物非常有用,可以作为
缓激肽拮抗剂。