Using COC(=O)/C=C/C(=O)O, COC(=O)/C=C/C(=O)OCCCl to produce COC(=O)/C=C/C(=O)OCCOC(=O)/C=C/C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.