Bicyclopentane derivatives

A compound of formula (I), or a solvate, or a pharmaceutically acceptable salt thereof:

• wherein
• R1 is selected from halogen, cyano, haloC1-6alkoxy, C1-6alkoxy, C1-6alkyl, C2-8alkynyl, cyanoC1-6alkoxy, haloC1-6alkyl, SF5, haloC2-6alkenyl, haloC1-6alkyl-thiol, and 4-6 membered heterocycloalkyl, which heterocycloalkyl is optionally substituted with one or two substituents independently selected from halogen and haloC1-6alkyl;
• R2 is selected from H, D, C1-6alkyl, hydroxyC1-6alkyl, and C1-6alkoxy;
• R3 is selected from H, D, C1-6alkyl, hydroxyC1-6alkyl, and C1-6alkoxy;
• or
• R2 and R3 together with the one carbon atom to which they are attached to, form a saturated monocyclic 3-6 membered cycloalkyl, which cycloalkyl is optionally substituted with one, two, three or four substituents independently selected from halogen and haloC1-6alkyl;
• R4 is selected from H, halogen, haloC1-6alkyl, C1-6alkoxy, and C1-6alkyl;
• R5 is selected from H, C1-6alkyl, hydroxyC1-6alkyl, and C1-6alkoxy;
• or R1 and R5, together with the two C-atoms they are attached to, form a 4-6 membered heterocycloalkyl ring system, which heterocycloalkyl is optionally substituted with one or two substituents independently selected from halogen and haloC1-6alkyl;
• and
• R8 is selected from H, halogen, haloC1-6alkyl, and haloC1-6alkoxy.