(8S)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1H)-one 、
(8S)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one 、 5-(chloromethyl)-1-methyl-1H-1,2,3-benzotriazole 、
1-溴戊烷 以1′-[(1-methyl-1H-benzotriazol-5-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one was obtained (15%) as a colorless solid的产率得到1'-[(1-methyl-1H-benzotriazol-5-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one