Using C1=COCCC1, CC1(C)OC(=O)C(=Cc2ccc(O)cc2)C(=O)O1 to produce CC1(C)OC(=O)C(=Cc2ccc(OC3CCCCO3)cc2)C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.