3-(3-amino-phenyl)-N-(3,3-dimethyl-6-nitro-2-oxo-1-pentyl-2,3-dihydro-1H-indol-5-yl)-propionamide 、
methanol-dichloromethane 在
N-{3-[2-(7,7-dimethyl-6-oxo-5-pentyl-1,5,6,7-tetrahydro-imidazo[4,5-f]indol-2-yl)-ethyl]-phenyl}-acetamide 、 silica gel 作用下,
以The desired N-{3-[2-(7,7-dimethyl-6-oxo-5-pentyl-1,5,6,7-tetrahydro-imidazo[4,5-f]indol-2-yl)-ethyl]-phenyl}-acetamide (229 mg) is obtained by flash chromatography on silica gel eluting with CH2Cl2/MeOH (99:1)的产率得到N-{3-[2-(7,7-dimethyl-6-oxo-5-pentyl-1,5,6,7-tetrahydro-imidazo[4,5-f]indol-2-yl)-ethyl]-phenyl}-acetamide