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7 - beta - amino - cepham - 3-one - 4 - carboxylsyreforbindelser and 1 - oxides and salts for use as an intermediate in the production of antibiotic active 7 - beta - acylamino - 3-cephem-4-carboxylic carboxylsyreforbinrelations
7 - beta - amino - cepham - 3-one - 4 - carboxylsyreforbindelser and 1 - oxides and salts for use as an intermediate in the production of antibiotic active 7 - beta - acylamino - 3-cephem-4-carboxylic carboxylsyreforbinrelations
