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 R1, R2 R 3 and R4 are as defined herein.
PDE4抑制作用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。本发明的化合物为公式(I):其中R1,R2,R3和R4如本文所述定义。