(3S,3'R)-3-[(N-(tert-butyloxycarbonyl)amino)butyl]spiro[(dihydropyrazine-2,5-dione)-6,3'-(2',3'-dihydrothieno[2,3-b]naphtho-4',9'-dione)] 、
三氟乙酸 以
二氯甲烷 为溶剂,
以100%的产率得到(3S,3'R)-3-(aminobutyl)spiro[(dihydropyrazine-2,5-dione)-6,3'-(2',3'-dihydrothieno[2,3-b]naphtho-4',9'-dione)] trifluoroacetate