[NH2:1][C:2]1[N:6]([CH:7]([CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH3:15])[CH2:8][CH3:9])[N:5]=[C:4]([CH3:16])[C:3]=1[C:17]([NH2:19])=[O:18].[CH2:20]1[O:28][C:27]2[CH:26]=[CH:25][C:24]([CH2:29][C:30](OC)=O)=[CH:23][C:22]=2[O:21]1.[O-]CC.[Na+].C(=O)([O-])O.[Na+]>ClCCl>[CH2:20]1[O:28][C:27]2[CH:26]=[CH:25][C:24]([CH2:29][C:30]3[NH:19][C:17](=[O:18])[C:3]4[C:4]([CH3:16])=[N:5][N:6]([CH:7]([CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH3:15])[CH2:8][CH3:9])[C:2]=4[N:1]=3)=[CH:23][C:22]=2[O:21]115 mg (0.055 mmol) of 5-amino-3-methyl-1-(3-nonyl)-1H-pyrazole-4-carboxamide and 53 mg (0.274 mmol) of methyl 3,4-methylenedioxyphenylacetate are refluxed for 6 hours in 0.5 ml of a 0.5M ethanolic sodium ethoxide solution. After dichloromethane and saturated aqueous sodium hydrogen carbonate solution have been added, the phases are separated. Purification by chromatography gives 11.8 mg (52%) of a solid, Rf=0.65 (dichloromethane/methanol=15:1).
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