The steril carbonate crystals of appropriate bulk-density were prepared by the methods of solvent-out crystallization in optimized condition,and the uniformity of the mixing cephalosporin and steril carbonate was improved.
采用溶析结晶法,通过优化结晶工艺条件,制备出合适松密度的无菌碳酸钠结晶,提高了其与头孢菌素原粉的混合、分装均匀性。
These intermediates include the products for penicillin, cephalosporin and lactamase inhibitors.
本文对β-内酰胺类抗生素用各种中间体的供求进行了综合分析,该类化学品分为青霉素系列产品用、头孢类抗生素用中间体和内酰胺酶抑制剂三类。
