Using COc1ccc(CCCBr)cc1OC, CCCc1c(O)ccc(C(=O)OC)c1O to produce CCCc1c(OCCCc2ccc(OC)c(OC)c2)ccc(C(=O)OC)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.