The invention encompasses novel compounds, pharmaceutically acceptable salts, hydrates, solvates, clathrates, enantiomers, diastereomers, racemates, or mixtures of stereoisomers thereof, pharmaceutical compositions of these compounds, and methods of using these compounds and compositions in mammals for treatment or prevention of diseases associated with PDE4.
                            该发明涵盖了新型化合物、药用盐、
水合物、溶剂合物、笼合物、对映体、非对映体、混合物或其立体异构体的混合物,这些化合物的药物组成物以及在哺乳动物中用于治疗或预防与PDE4相关疾病的方法。