Using C=C(CCOC)C(=O)OCc1ccccc1, O=C(O)C1CCCC1 to produce COCCC(CC1(C(=O)O)CCCC1)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.