The invention relates to a compound of formula (I)
wherein A
1
and R
1
to R
5
are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament.
这项发明涉及一种化合物,其
化学式为(I),其中A1和R1至R5的定义如描述和权利要求中所述。化合物的
化学式(I)可用作药物。