| 摘要 |
Antibiotic penem compounds are represented by formula (I), wherein R represents a group of formulae (II) or (III) in which R1 is a linear or branched, C1-C6 alkyl group, R2 is a particular substituted or unsubstituted alkyl, aryl or aralkyl group, n is an integer of 1 or 2, and R3 represents a specific substituted o r unsubstituted alkyl; aryl or aralkyl group: Antib- iotic compositions for oral administration are also described.
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