[C:1]([O:7][C:8]([CH3:11])([CH3:10])[CH3:9])(=[O:6])[CH2:2][C:3]([CH3:5])=O.Cl[CH:13]([CH3:17])[C:14](=O)[CH3:15].[C:18]([NH:21][CH2:22][CH2:23][NH2:24])(=[O:20])[CH3:19]>>[C:18]([NH:21][CH2:22][CH2:23][N:24]1[C:14]([CH3:15])=[C:13]([CH3:17])[C:2]([C:1]([O:7][C:8]([CH3:11])([CH3:10])[CH3:9])=[O:6])=[C:3]1[CH3:5])(=[O:20])[CH3:19]By reaction of tert.-butyl acetoacetate with 3-chloro-2-butanone and 2-acetylaminoethylamine analogously to Example 1.
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