2 ethoxy 1 naphthalenyl penicillin, 2 ethoxy 1 naphthyl penicillin, 2s 5r 6r 6 2 ethoxynaphthalen 1 yl carbonyl amino 3 3 dimethyl 7 oxo 4 thia 1 azabicyclo 3 2 0 heptane 2 carboxylic acid
For the treatment of infections caused by penicillinase-producing staphylococci which have demonstrated susceptibility to the drugs.