4-methoxybenzyl 7β-[2-(5-trityl-aminothiadiazol-3-yl)-2-methoxyiminoacetamido]-3-chloro-methyl-3-cephem-4-carboxylate 、
吡唑并[1,5-a]嘧啶-7-胺 以90%的产率得到4-methoxybenzyl 7β-[2-(5-tritylamino-thiadiazol-3-yl)-2-methoxyiminoacetamido]-3-(7-amino-pyrazolo[1,5-a]pyrimidinium-4-yl)methyl-3-cephem-4-carboxylate iodide