Id. Kersey et al., PHOTOACTIVATABLE ANALOGS OF A SUBSTANCE-P NONPEPTIDIC ANTAGONIST, FORPROBING THE ANTAGONIST BINDING-SITE OF THE NK1 RECEPTOR, Bioorganic & medicinal chemistry letters, 5(12), 1995, pp. 1271-1274
2S,3S)-3-(2-methoxybenzylamino)-2-phenylpiperidine (CP-99,994) binds w
ith high affinity (pK(i) 9.6) to the human NK1 receptor. Racemic analo
gues of CP-99,994 containing either benzoyl or diazirinyl moieties als
o bind with high affinity (pK(i) 9.4 and 9.1 respectively), These anal
ogues are of tremendous potential for mapping the antagonist binding s
ite of the NK1 receptor.