The invention relates to a compound of formula (I) wherein R
1
to R
4
are defined as in the description and in the claims. The compound of formula (I) is a CB2 agonist and can be used as an active ingredient in a medicament.
本发明涉及一种化合物,其
化学式为(I),其中R1至R4的定义见说明书及权利要求书。化合物(I)是CB2激动剂,可用作药物中的活性成分。