Citric Acid → 3-(2-Bromo-6-ethoxy-4-formylphenoxymethyl)-benzoic acid methyl ester

Reaction equation

[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([CH2:10]Br)[CH:5]=1.C([O-])([O-])=O.[K+].[K+].[Br:19][C:20]1[C:21]([OH:31])=[C:22]([O:28][CH2:29][CH3:30])[CH:23]=[C:24]([CH:27]=1)[CH:25]=[O:26].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>[N+](CCCC)(CCCC)(CCCC)CCCC.[I-].CN(C=O)C.O>[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([CH2:10][O:31][C:21]2[C:22]([O:28][CH2:29][CH3:30])=[CH:23][C:24]([CH:25]=[O:26])=[CH:27][C:20]=2[Br:19])[CH:5]=1