(R)-Piperazine-2-carboxylic acid (I) is sequentially protected with Boc-ON as the 4-Boc piperazine (II) and then with Fmoc-Cl to afford the 1-Fmoc-4-Boc-piperazine (III). Subsequent coupling of the protected piperazinecarboxylic acid (III) with 1-(3-aminopropyl)imidazole (IV) furnishes amide (V). The N-Fmoc group of (V) is selectively removed with piperidine in THF to provide amine (VI), which is further coupled with cyclohexyl isocyanate (VII), yielding urea (VIII). Then, the N-Boc protecting group of (VIII) is cleaved by means of trifluoroacetic acid to give (IX). Finally, condensation of piperazine (IX) with the tricyclic alkyl chloride (X) in the presence of 1,2,2,6,6-pentamethylpiperidine generates the title compound. (1,2)