A round bottom flask was charged with ethyl 3-[5-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-isoquinolinyl]propanoate (D8; 80 mg, 0.172 mmol), tetrahydrofuran (THF) (4.00 ml), methanol (4.00 ml), water (2 ml) and lithium hydroxide (4.11 mg, 0.172 mmol). The mixture was warmed to 80° C. for 2 h after which time the solvent was removed in vacuo and the resultant red solid triturated with diethyl ether. The resulting slurry was filtered and the solid dried in vacuo to give the title compound as a brick coloured solid (60 mg).
