发明授权
US4822888A New cepham compounds and processes for the production thereof 失效
新的头孢烯化合物及其制备方法

New cepham compounds and processes for the production thereof
摘要:
A compound of the formula: ##STR1## wherein R.sup.2 is halo(lower)alkyl, andR.sup.6 is amino or protected amino, its reactive derivative at the carboxy group or its lower alkyl ester, is disclosed, having utility as an intermediate for producing cephems or cephams.
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