A mixture of the (S)-2-{[2-(2-1H-Indazol-4-yl-acetylamino)-4-methyl-thiazole-5-carbonyl]-amino}-3-[(thiophene-2-carbonyl)-amino]-propionic acid methyl ester (34 mg, 0.0646 mmol), lithium hydroxide monohydrate (32 mg, 0.763 mmol), THF (2 mL) and water (1 mL) was stirred at 25° C. for 1½ h. Aqueous 2N HCl was added and the reaction mixture was stirred for 2 hrs and then concentrated under reduced pressure. The resulting crude product was purified by HPLC to give (S)-2-{[2-(2-1H-Indazol-4-yl-acetylamino)-4-methyl-thiazole-5-carbonyl]-amino}-3-[(thiophene-2-carbonyl)-amino]-propionic acid (21 mg, 63.5%) as a white solid. MS m/e 513.5 (M+H+).
