[EN] NOVEL AMIDO-SUBSTITUTED HYDROXY-6-PHENYLPHENANTHRIDINES AND THEIR USE AS PDE4 INHIBITORS [FR] NOUVEAUX HYDROXY-6-PHENYLPHENANTHRIDINES AMIDO-SUBSTITUES ET LEUR UTILISATION COMME INHIBITEURS DE PDE4
[EN] NOVEL DIFLUOROETHOXY-SUBSTITUTED HYDROXY-6-PHENYLPHENANTHRIDINES AND THEIR USE AS PDE4 INHIBITORS [FR] NOUVELLES HYDROXY-6-PHENYLPHENANTHRIDINES DIFLUOROETHOXY-SUBSTITUEES