[EN] NOVEL PYRAZINE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE PYRAZINE
申请人:HOFFMANN LA ROCHE
公开号:WO2013060751A1
公开(公告)日:2013-05-02
The invention relates to a compound of formula (I), wherein R1 to R4 are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament.