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Fremgangsmåde til fremstilling af 7beta-(D-5-amino-5-carboxyvaleramido)-3-(carbamoyloxymethyl)-7-methoxy-3-cephem-4-carboxylsyre eller pharmaceutisk acceptable salte deraf.
Analogifremgangsmåde til fremstilling af 3-formylamino-4-hydroxy-alfa-(N-(1-methyl-2-p-methoxyphenylethyl)aminomethyl)benzylalkohol eller syreadditionssalte deraf.
Analogifremgangsmaade til fremstilling af n-(heteroarylmethyl)-7alfa-acyl-6,14-endoetheno- eller -endoethano-tetrahydronororipaviner eller-thebainer eller syreadditionssalte deraf