sixty-one derivatives were constructed producing tem-1 , tem-2 , shv-1 , ctx-1 , tem-4 , caz-2 , shv-2 , shv-3 , shv-4 , the mics of cefixime were stable against derivatives producing a penicillinase ( tem-1 , tem-2 , shv-1 ) , but not against those producing an esb .
C0007554
ctx
C0060400
cefixime