| 摘要 |
<p><IMAGE> R and R11 are hydrogen; alkali metal; R1 and R2 are independently selected from the group consisting of hydrogen- methyl, ethyl, n-propyl and i-propyl; R4 is in the a-configuration and is hydrogen or methoxy; R5 is hydrogen or lower alkyl; R6 is lower alkyl; R7 is hydrogen, -OCOCH3, -OCONH2, <IMAGE> or <IMAGE> R9 is hydrogen or -CONH2; R10 is hydrogen or a protecting group; R12 is hydrogen or lower alkyl; R13 is hydrogen, lower alkyl, <IMAGE> or -CH2)p-N-(lower alkyl)2; R14 is hydrogen, sodium or potassium; n is 0, 1 or 2; m is 0, 1 or 2; p is 1, 2, 3 or 4. These compounds are useful antibacterial agents.</p> |
