The invention provides a compound of formula (I) or a salt thereof:
wherein Ar has the sub-formula (w), (y), (z1) or (z2):
wherein the several groups are defined herein below, and the use of these compounds as inhibitors of phosphodiesterase type IV (PDE4).
本发明提供了式(I)的化合物或其盐:其中Ar具有子式(w),(y),(z1)或(z2):其中各个基团在下文中定义,并使用这些化合物作为
磷酸二酯酶IV型(PDE4)的
抑制剂。