Method The condensation product of 7 ACA with furan 2 thiol formic acid and reacted with AE thiolester to obtain ceftiofur acid.

• 方法7-ACA与2-呋喃甲硫羟酸缩合后,与AE活性酯反应得头孢噻呋酸,然后依次将之转化为头孢噻呋盐酸盐及头孢噻呋钠。