| 摘要 |
This invention relates to a new class of antibiotics (I): <IMAGE> wherein the stylized radical (hereafter referred to as R'): <IMAGE> attached to the 3-amino nitrogen of nocardicin represents a mono- or polycyclic N-containing heterocyclic group; R is, inter alia, hydrogen, substituted and unsubstituted: alkyl, aryl, alkenyl, heterocyclylalkyl, heterocyclylalkenyl, aralkenyl, aralkyl, -NR2, COOR, CONR2, -OR, or CN.
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