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Javier Adrio, Juan C. Carretero, José L. García Ruano, Antonio Pallarés, and Mercedes Vicioso.
An Efficient Synthesis of Ofloxacin and Levofloxacin from 3,4-Difluoroaniline. Heterocycles.
Vol 51, Issue 7, 1999, pp.1563-1572,
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http://dx.doi.org/10.3987/COM-99-8529
