Using CCC(CO)(c1ccc(Cl)cc1)n1ccc2c(-n3c(C)ccc3C)cccc21, CI to produce CCC(COC)(c1ccc(Cl)cc1)n1ccc2c(-n3c(C)ccc3C)cccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.