methods are described for the preparation of pure crystalline samples of the penicilloic and penilloic acids of penicillin g , carbenicillin , cloxacillin , floxacillin , methicillin , penicillin v , and ticarcillin and the penicilloic acids of amoxicillin , ampicillin , phenethicillin , and propicillin .
C0030827
penicillin g
C0006976
carbenicillin