title: [Studies on ketene and its derivatives. XLII. Ring-expansion of 1-acetoacetylaziridine].
mesh_terms: D000090:Acetoacetates; D001389:Azirines; D055598:Chemical Phenomena; D002621:Chemistry; D007259:Infrared Rays; D009682:Magnetic Resonance Spectroscopy; D013053:Spectrophotometry
chemical_list: D000090:Acetoacetates; D001389:Azirines