1'-(4-hydroxybenzyl)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one 、
1'-(3-hydroxybenzyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one 、
二甲氨基氯乙烷盐酸 、
2-碘乙酰胺 以1′-{4-[2-(dimethylamino)ethoxy]benzyl}-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1H)-one was obtained (26%) as a colorless solid的产率得到1'-{4-[2-(dimethylamino)ethoxy]benzyl}-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one