| 摘要 |
Compounds of general formula: <IMAGE> in which: A denotes either an oxygen atom, or a group of the formula N O-Y-R5, , B, X, Y, R1, R2, R3, R4, R5, R8, R9 and R10 being defined in the description. Medicinal products containing the same, and their use in broad-spectrum antibiotic therapy for the treatment of infections.
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