[CH2:1]([N:8]([CH2:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)[CH2:9][CH2:10][C:11]1[C:19]2[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=2)[NH:13][CH:12]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:27]N(C=O)C.[H-].[Na+].CI>O>[CH3:27][N:13]1[C:14]2[C:19](=[CH:18][CH:17]=[CH:16][CH:15]=2)[C:11]([CH2:10][CH2:9][N:8]([CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[CH2:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[CH:12]1N,N-dibenzyl-tryptamine (1.72 g) was added to an anhydrous DMF solution containing 0.24 g of NaH (60% nujol) and the mixture was stirred for 15 minutes. Methyl iodide (0.31 ml) was added and the mixture was stirred for one hour. Water was added and the solvent was evaporated off. The residue to which water was added was extracted with IPE, the extract was washed with water and the brine and dried over magnesium sulfate. The crude product was purified by column chromatography on silica gel. Eluates with ethyl acetate/hexane (1/9) afforded 1.58 g of the oily title compound.
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