Triazolopyrazine

A compound of formula (I)

• wherein,
• R1 is —C1-3alkyl or —C1-3haloalkyl;
• R2 is selected from —NHR4, —C1-5alkyl, —C1-5haloalkyl, halogen and —S—C1-3alkyl;
• R3 is a 5-12 membered heteroaryl, which group is substituted with —X—R10 and optionally further substituted with one or more groups independently selected from R9;
• R4 is selected from —C1-5alkyl and 5-12 membered heterocycloalkyl, which heterocycloalkyl can be optionally substituted with one or more groups independently selected from R5;
• R5 is selected from —C1-5alkyl, —C1-5haloalkyl and —C1-3alkylene-O—C1-3alkyl;
• R9 is selected from —C1-5alkyl, —O—C1-5alkyl, —N(C1-5alkyl)2, halogen, —C1-3alkylene-O—C1-3alkyl, —C1-5alkylene-N(—C1-5alkyl, —C1-5 alkyl) and 5-12 membered heterocycloalkyl, wherein the heterocycloalkyl group can be optionally substituted with one or more groups independently selected from ═O and —C1-3alkyl, or
• R9 is selected from —C6-10aryl and 5-12 membered heteroaryl, wherein the aryl and heteroaryl groups can be optionally and independently substituted with one ore more groups selected from halogen, —C1-3alkyl, —O—C1-3alkyl, —C1-3haloalkyl, —O—C1-3haloalkyl, —N(C1-5alkyl, C1-5alkyl) and —NH—C1-5alkyl;
• X is —C1-3alkylene- or —O—;
• R10 is-C6-10aryl or 5-12 membered heteroaryl, each of which groups can be optionally substituted with one or more groups selected from halogen, —C1-3alkyl, —O—C1-3alkyl, —C1-3haloalkyl and —O—C1-3haloalkyl;
• or a pharmaceutically acceptable salt thereof.