[CH2:1]([O:3][C:4]1[C:11]([O:12][CH2:13][CH3:14])=[CH:10][C:7]([CH:8]=O)=[C:6]([N+]([O-])=O)[C:5]=1[N+:18]([O-:20])=[O:19])[CH3:2].[CH3:21]N(C)C=O.C[CH:27]([SH:31])[C:28]([O-:30])=[O:29]>C(N(CC)CC)C>[CH3:21][O:30][C:28]([C:27]1[S:31][C:6]2[C:5]([N+:18]([O-:20])=[O:19])=[C:4]([O:3][CH2:1][CH3:2])[C:11]([O:12][CH2:13][CH3:14])=[CH:10][C:7]=2[CH:8]=1)=[O:29]4,5-Diethoxy-2,3-dinitro-benzaldehyde (1.53 g) was dissolved into N,N-dimethylformamide (6 ml) and then methylthioglycolate (1.36 ml) was added. Triethylamine (2.6 ml) was added in cold to the reaction solution. The mixture was stirred overnight. The solid was filtered and washed with N,N-dimethylformamide.
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