[CH2:1]([O:3][C:4](=[O:25])[C:5]1[CH:10]=[CH:9][C:8]([N:11]2[C:19]3[C:14](=[CH:15][C:16]([C:20](O)=[O:21])=[CH:17][CH:18]=3)[C:13]([C:23]#[N:24])=[CH:12]2)=[CH:7][CH:6]=1)[CH3:2].Cl.[CH3:27][NH:28][CH3:29].C(N(CC)CC)C.Cl>CN(C)C1C=CN=CC=1.ClCCl>[CH2:1]([O:3][C:4](=[O:25])[C:5]1[CH:10]=[CH:9][C:8]([N:11]2[C:19]3[C:14](=[CH:15][C:16]([C:20]([N:28]([CH3:29])[CH3:27])=[O:21])=[CH:17][CH:18]=3)[C:13]([C:23]#[N:24])=[CH:12]2)=[CH:7][CH:6]=1)[CH3:2]
To a solution of 4-(5-carboxy-3-cyanoindol-1-yl)benzoic acid ethyl ester (0.084 g), dimethylamine hydrochloride (0.061 g), triethylamine (0.13 g) and 4-dimethylaminopyridine (0.006 g) in dichloromethane (2.5 mL) was added N-ethyl-N′-3-dimethylaminopropylcarbodiimide (0.058 g) at room temperature, and this mixture was stirred at room temperature overnight. This reaction mixture was poured into 1 mol/L hydrochloric acid, and this mixture was extracted with ethyl acetate. This organic layer was washed with a saturated aqueous sodium bicarbonate solution and brine, dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: ethyl acetate/n-hexane=1/2) to give the title compound (0.020 g).
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