Using CCC(=O)CC(=O)CC, ICCCOc1ccc(OCCCI)cc1 to produce CCC(=O)C(CCCOc1ccc(OCCCC(C(=O)CC)C(=O)CC)cc1)C(=O)CC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.