Compounds of formula I or a stereoisomer or pharmaceutically-acceptable salt thereof, are useful in the modulation of IL-12, IL-23 and/or IFNα, by acting on Tyk-2 to cause signal transduction inhibition.
式I或其立体异构体或药用可接受盐的化合物,通过作用于Tyk-2以引起信号传导抑制,对调节IL-12、I
L-23和/或IFNα具有用处。