Using CCOC(C)=O, COC(=O)c1cn(C(c2ccccc2)(c2ccccc2)c2ccccc2)cn1 to produce CCOC(=O)CC(=O)c1cn(C(c2ccccc2)(c2ccccc2)c2ccccc2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.