title: Preparation of 7-epi-cephalosporin derivatives.
mesh_terms: D002511:Cephalosporins / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D006868:Hydrolysis; D007536:Isomerism; D012545:Schiff Bases
chemical_list: D002511:Cephalosporins; D012545:Schiff Bases