title: [Clinical exaluation of a new analgesic agent Ap-237].
mesh_terms: D000328:Adult; D000700:Analgesics / Q000009:adverse effects / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D007273:Injections, Intramuscular; D007743:Labor, Obstetric; D008297:Male; D008875:Middle Aged; D010879:Piperazines / Q000627:therapeutic use*; D010919:Placebos; D011247:Pregnancy
chemical_list: D000700:Analgesics; D010879:Piperazines; D010919:Placebos