Using COCC(CC(=O)OC)n1c(=O)n(Cc2cn(C)c3cccc(C)c23)c2ccccc21 to produce COCC(CC(=O)O)n1c(=O)n(Cc2cn(C)c3cccc(C)c23)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.