PDE4 inhibition is achieved by novel compounds, e.g., N-substituted aniline and diphenylamine analogs. The compounds of the present invention are of Formula I:
wherein R
1
, R
2
, R
3
and R
4
are as defined herein.
PDE4抑制是通过新型化合物实现的,例如,N-取代
苯胺和二苯
胺类似物。本发明的化合物属于公式I:其中R1,R2,R3和R4如本文所定义。