[1-(5-nitro-pyridin-2-yl)-pyrrolidin-3-yloxy]-acetic acid tert-butyl ester 、
2-苯基-5-(三氟甲基)唑-4-羧酸 、
三乙胺 、
卡特缩合剂 、 以to yield (1-{5-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-pyridin-2-yl}-pyrrolidin-3-yloxy)-acetic acid tert-butyl ester as a solid (170 mg)的产率得到(1-{5-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-pyridin-2-yl}-pyrrolidin-3-yloxy)-acetic acid tert-butyl ester