Cephem compounds and processes for preparation thereof
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04703046A1
公开(公告)日:1987-10-27
This invention concerns antibiotic cephalosporins of the formula ##STR1## wherein R.sup.1 is amino or protected amino; R.sup.2 is halogen; R.sup.3 is alkyl; and R.sup.6 is carboxy or protected carboxy.