3-cyclopropyl-3-[[5-cyclopropyl-4-[(1S)-2,2,2-trifluoro-1-methyl-ethoxy]pyridine-2-carbonyl]amino]butanoic acid 、
氯化铵 以isolated (150 mg, 72%)的产率得到N-(4-amino-2-cyclopropyl-4-oxobutan-2-yl)-5-cyclopropyl-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridine-2-carboxamide