[CH3:1][CH:2]([CH3:18])[CH2:3][CH:4]([NH2:17])[C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[N:11]1[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1.CO>CC(C)=O>[CH3:1][CH:2]([CH3:18])[CH2:3][C@H:4]([NH2:17])[C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[N:11]1[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1Equimolar quantities of racemic 3-methyl-1-(2-pieridinophenyl)-1-butylamine and of N-acetyl-L-gluatmic acid were refluxed in aceton, whereby methanol was added in such an amount to yield a clear solution.
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