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)的化合物或其立体异构体或药用盐在调节IL-12、I
L-23和/或IFNα方面具有用处,通过作用于Tyk-2引起信号传导抑制。