Using CCOC(=O)CN1CCC(Oc2cc3cc[nH]c(=O)c3cc2Cl)CC1 to produce O=C(O)CN1CCC(Oc2cc3cc[nH]c(=O)c3cc2Cl)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.