Using C1CCOC1, CCCCOc1c(C=O)n(C)c(=O)c2cc(Cl)c(Cl)cc12 to produce CCCCOc1c(C(C)O)n(C)c(=O)c2cc(Cl)c(Cl)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.