5-cyclopropyl-6-cyclopropylmethoxy-pyrazine-2-carboxylic acid 、
4,4-dimethylpyrrolidine-2-carboxylic acid amide hydrochloride 以isolated (142 mg, 93%) as light yellow foam的产率得到1-(5-cyclopropyl-6-cyclopropylmethoxy-pyrazine-2-carbonyl)-4,4-dimethylpyrrolidine-2-carboxylic acid amide