[CH3:1][N:2]1[CH:6]=[CH:5][C:4]([CH:7]=O)=[N:3]1.[CH2:9]([NH2:11])[CH3:10]>C1COCC1>[CH2:9]([NH:11][CH2:7][C:4]1[CH:5]=[CH:6][N:2]([CH3:1])[N:3]=1)[CH3:10]prepared by reaction of 1-methyl-1H-pyrazole-3-carbaldehyde (prepared according to WO2004/058702) with 2M ethylamine in THF.
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