From search of external encyclopedias:
Diketopiperazines (Category) [Lactams] [Piperazines] ...
Phenylpiperazines (Category) [Benzene derivatives] [Anilines] [Piperazines] ...
Methylpiperazine (Chemistry) [Piperazines] ...
Piberaline (Chemistry) [2-Pyridyl compounds] [Carboxamides] [Piperazines] Chemical compound ...
Pipofezine (Chemistry) [Tricyclic antidepressants] [Pyridazines] [Piperazines] Chemical compound ...
Cinepazide (Chemistry) [Piperazines] [Pyrogallol ethers] [Carboxamides] Chemical compound ...
Diphenylmethylpiperazine (Chemistry) [Benzhydryl compounds] [Piperazines] Kaczor A, Matosiuk D. Non-peptide opioid receptor ligands - recent advances ...
Mefeclorazine (Chemistry) [Piperazines] [Methoxy compounds] [Catecholamines] ...
Lesopitron (Chemistry) [Chloroarenes] [Aminopyrimidines] [Pyrazoles] Chemical compound ...
Eprozinol (Chemistry) [Phenylethanolamine ethers] [Secondary alcohols] [Piperazines] ...
Tilapertin (Chemistry) [Piperazines] [Trifluoromethyl compounds] [Antipsychotics] Chemical compound ...
Teneligliptin (Chemistry) [Piperazines] [Pyrazoles] [Dipeptidyl peptidase-4 inhibitors] Chemical compound ...
Mazipredone (Chemistry) [Pregnanes] [Piperazines] [Glucocorticoids] Chemical compound ...
Mepirapim (Chemistry) [Piperazines] [Designer drugs] [Cannabinoids] Chemical compound ...
Zavegepant (Chemistry) [Ureas] [Quinolines] [Indazoles] Medication for treatment of migraine ...
Gosogliptin (Biology) [Organofluorides] [Piperazines] [Pyrimidines] Chemical compound ...
Saruparib (Chemistry) [Pyridines] [Piperazines] ...
Centhaquine (Chemistry) [Piperazines] [Quinolines] ...
Pruvanserin (Chemistry) [Phenethylamines] [Piperazines] [Indoles] Chemical compound ...
Picloxydine (Chemistry) [Chloroarenes] [Piperazines] [Guanidines] ...
Netupitant (Chemistry) [Piperazines] [Trifluoromethyl compounds] [Antiemetics] Chemical compound ...
Ceftiolene (Chemistry) [Ketoximes] [Piperazines] [Thiazoles] Chemical compound ...
Clopenthixol (Chemistry) [Thioxanthene antipsychotics] [Primary alcohols] [Chloroarenes] Antipsychotic medication ...
Lurtotecan (Chemistry) [Topoisomerase inhibitors] [Piperazines] ...
Opelconazole (Chemistry) [Fluoroarenes] [Benzamides] [Piperazines] Chemical compound ...
Vepdegestrant (Chemistry) [Hydroxyarenes] [Piperazines] [Piperidines] Vepdegestrant (developmental code name ARV-471 ) is an investigational oral proteolysis-targeting ...
Senaparib (Chemistry) [Quinazolinones] [Pyrimidines] [Piperazines] ...
Erastin (Chemistry) [Phenol ethers] [Piperazines] [Chloroarenes] ...
HEPPS (Chemistry) [Primary alcohols] [Piperazines] [Sulfonic acids] Buffer; ...
Lorundrostat (Chemistry) [Acetamides] [Piperazines] [Triazines] Chemical compound ...