Novel tricyclic pyrimidine compounds and tricyclic pyridine compounds having JAK inhibitory activities are provided. A tricyclic heterocyclic compound represented by the formula (I
a
): wherein the rings A
a
and B
a
, X
a
, Y
a
, R
1a
, R
2a
, R
3a
, L
1a
L
2a
, L
3a
and n
a
are as defined in the description.
本发明提供了具有JAK抑制活性的新型
三环嘧啶化合物和
三环吡啶化合物。其中,化合物的式(Ia)表示为:其中,环Aa和Ba,Xa,Ya,R1a,R2a,R3a,L1a
L2a,L3a和na的定义详见说明。