5-cyclopropyl-6-cyclopropylmethoxy-pyrazine-2-carboxylic acid 、
2-Amino-N,N,3-trimethylbutanamide hydrochloride 以isolated (35 mg, 28.4%) as white solid的产率得到5-cyclopropyl-6-cyclopropylmethoxy-pyrazine-2-carboxylic acid (1-dimethylcarbamoyl-2-methyl-propyl)-amide