Question

The common structural feature of penicillins and cephalosporins is ____.

1.Thiazolidine ring2.-lactam ring3.Dihydrothiazine ring4.Aminoacyl side chain​

Answer 1

Explanation:

the lacktam ring and sometimes the side chain group, are structural features common to penicillins and cephaloaporins(for example amplicillin and cefaclor),so, theoretically at least, allergenic cross -reaction between some penicillins cephalosprins seems likely.