| 摘要 |
<p>Compounds of formula XIV, XII and XIII <IMAGE> in which R represents a hydrogen atom or a carboxy protecting group, R<13> represents a hydroxy protecting group, R<14> represents a phenyl group or a C1-4 alkyl group R<15> represents a phenyl group or C1-4 alkyl group and R<23> represents a carboxy protecting group, are intermediates for the production of compounds having antibacterial and/or beta -lactamase inhibiting activity. <IMAGE></p> |
