Using COC(=O)CCc1cccc(OCc2ccc(-c3cccc(OC)c3)c(C)c2)c1 to produce COc1cccc(-c2ccc(COc3cccc(CCC(=O)O)c3)cc2C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.