3,7-Disubstituted-3-cephem compounds and process for production of the same.

摘要

Cephem compounds of the formula: …… wherein R<1> is amino or protected amino,…     R<2> is hydrogen or hydroxy protective group,…     R<3> is carboxy, COO<(-)> or protected carboxy, ……       wherein R<4> is lower alkyl, and…         R<5> is hydrogen or lower alkyl substituted with hydroxy or protected hydroxy,…     X is acid residue, and…     n is 0 or l,… pharmaceutically acceptable salts thereof, processes for preparing the same, pharmaceutical compostions comprising the same and their use in treating infectious diseases.