title: Letter: Studies on lactams. XXIX. Synthesis of aza analogs of Cepham.
mesh_terms: D007769:Lactams / Q000138:chemical synthesis*; D010647:Phenyl Ethers / Q000138:chemical synthesis; D011743:Pyrimidines
chemical_list: D007769:Lactams; D010647:Phenyl Ethers; D011743:Pyrimidines