azlocillin , cefoxitin , mezlocillin or spectinomycin ( 20 mg/kg i.v . ) and penicillin or piperacillin ( 50 mg/kg i.v . ) also showed a significant antithrombotic effect , which , however , disappeared on doubling of the applied dose .
C0030842
penicillin
C0031955
piperacillin