title: [Synthesis of ethylene amines. XI. Synthesis of 1,2,4-trimethylpiperazine].
mesh_terms: D010879:Piperazines / Q000138:chemical synthesis*
chemical_list: D010879:Piperazines
vernacular_title: Synteza amin etylenowych. XI. Synteza 1,2,4-trójmetylopiperazyny.