| abstract |
The compounds having the formula (1) or pharmaceutically acceptable salts or averages thereof, wherein A1 is nitrogen or (11), where W is selected from (group consisting of (1) hydrogen and (2) alkyl optionally substituted; A7 is selected from the group consisting of (1) -S-, (2) -O-, and (3) -N (R7) -, where R7 is hydrogen or C1-C6 alkyl; and R5 and R6 together are a carbocyclic or heterocyclic ring, they are useful as antibacterial agents. |