发明授权
US4717767A 7-amino-3-(pyrazinylmethyl) or (pyridazinylmethyl)-cephalosporins 失效
7-氨基-3-(吡嗪基甲基)或(哒嗪基甲基) - 头孢菌素

7-amino-3-(pyrazinylmethyl) or (pyridazinylmethyl)-cephalosporins
摘要:
This invention relates to a 7-amino-3-(pyrazinylmethyl)- or (pyridazinylmethyl)-cephalosporins of the formula: ##STR1## wherein R.sup.1 represents a hydrogen atom or a carboxyl-protecting group; R.sup.2 represents a group of the formula: ##STR2## in which R.sup.6 represents a hydrogen atom, a C.sub.1-5 alkyl group or a di-C.sub.1-5 alkylamino group; R.sup.13 represents a C.sub.1-5 alkyl group; and R.sup.28 represents an amino group.
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