(3S,3'S)-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,6'S)-6'-(4-aminobutyl)spiro[2H-benzo[f][1]benzothiole-3,3'-piperazine]-2',4,5',9-tetrone;2,2,2-trifluoroacetic acid