title: Preparation of new nitrogen-bridged heterocycles. XIII. Syntheses of some tricyclic and tetracyclic indolizine derivatives with antiallergic activity.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006967:Hypersensitivity / Q000188:drug therapy*; D007212:Indolizines / Q000138:chemical synthesis*; D011758:Pyrroles / Q000138:chemical synthesis; D011804:Quinolines / Q000138:chemical synthesis
chemical_list: D007212:Indolizines; D011758:Pyrroles; D011804:Quinolines