Compounds having the following formula (I): or a stereoisomer or pharmaceutically-acceptable salt thereof, where R1, R2, R3, R4, and R5 are as defined herein, are useful in the modulation of IL-12, IL-23 and/or IFNα by acting on Tyk-2 to cause signal transduction inhibition.
具有以下式(I)的化合物或其立体异构体或药用可接受的盐,在此处R1、R2、R3、R4和R5的定义如下,通过作用于Tyk-2引起信号传导抑制,对IL-12、I
L-23和/或IFNα的调节具有用处。