头孢唑兰母核 7-ACP

 1-[[(6R,7R)-7-氨基-2-羧基-8-氧代-5-硫杂-1-氮杂二环[4.2.0]辛-2-烯-3-基]甲基]咪唑并[1,2-b]哒嗪内盐

Imidazo[1,2-b]pyridazinium, 1-[(7-amino-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl)methyl]-, inner salt, (6R-trans)-

For Cefozopran