Cyclic amidinyl and cyclic guanidinyl thio carbapenems
申请人:Merck & Co., Inc.
公开号:US04717728A1
公开(公告)日:1988-01-05
Compounds of the formula: ##STR1## and the pharmaceutically acceptable salts thereof wherein X is ##STR2## wherein each R is hydrogen or alkyl of 1 to 6 carbon atoms are disclosed. The compounds are useful as antibiotics.