Using O=C(O)CI, CCC12CCC(=O)C=C1c1c(cc(O)c(Cl)c1Cl)C2 to produce CCC12CCC(=O)C=C1c1c(cc(OCC(=O)O)c(Cl)c1Cl)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.