Treatments for pain

A Compound of formula (I)

• Or a pharmaceutically acceptable salt or solvate thereof, wherein:
• X is N or CR9
• R1 is selected from:
• O—C1-6 alkyl
• O—R10
• O—C1-6 alkyl-R10
• R11
• R2 is selected from
• R3 is H or NH2
• R4 is CF3, CF2CH2OH, CN
• R5 is halo
• R6 is H
• R7 is H
• R8 is Ph, ortha substituted by CH2NHCH3
• R9 is H, OCH3, F and CN
• R10 is 4-6 membered saturated heterocycle containing 1-2 heteroatoms, selected from O, N & S wherein S may also include SO and SO2 moieties, said heterocycle may also be optionally substituted by C(O)C1-6 alkyl, S(O)2C1-6 alkyl and C1-6 alkyl,
• R11 is 4-6 membered saturated, or partially saturated heterocycle containing 1-2 heteroatoms, selected from O, N & S wherein S may also include SO and SO2 moieties, said heterocycle may also be optionally substituted by 1-2 groups selected from C(O)C1-6alkyl, N C(O)C1-6 alkyl, OH, an ether linkage to form a bi-cycle and C1-6 alkyl.