5-cyclopropyl-6-cyclopropylmethoxy-pyrazine-2-carboxylic acid 、 alpha-Cyclopropyl-5-methyl-1,2,4-oxadiazole-3-methanamine 以isolated (95 mg, 86%) as light yellow solid的产率得到5-cyclopropyl-6-cyclopropylmethoxy-pyrazine-2-carboxylic acid (cyclopropyl)[(5-methyl-[1,2,4]oxadiazol-3-yl)methyl]amide