7'-Fluoro-1'-[(1-isopropylpiperidin-4-yl)methyl]spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol] 、 1'-(piperidin-4-ylmethyl)spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one 、
2-溴吡啶 、
溴苯 以1′-(2-(pyridin-2-ylamino)ethyl)-spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one was obtained as the first fraction from the chromatography as a white solid (5%)的产率得到1'-[2-(pyridin-2-ylamino)ethyl]spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one