Using CCCc1c(OCCCBr)ccc(C(C)=O)c1O, CC1(C(=O)O)CCc2cc(O)ccc2O1 to produce CCCc1c(OCCCOc2ccc3c(c2)CCC(C)(C(=O)O)O3)ccc(C(C)=O)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.