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method and diagnostic agent for the investigation of a biological sample on beta lactamase activity.and method for the preparation of a 7 - acylamino - 3 - (2 - arylvinyleen) - 3 - 4 - cefem carbonzuurderivaat.
method and diagnostic agent for the investigation of a biological sample on beta lactamase activity.and method for the preparation of a 7 - acylamino - 3 - (2 - arylvinyleen) - 3 - 4 - cefem carbonzuurderivaat.