D-(-)-alpha-苯甘氨酸

头孢氨苄

四氮唑乙酸

头孢唑啉杂质C

(6R)-3-methyl-8-oxo-7t-(trimethylsilanyl-amino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid trimethylsilanyl ester