Using O=C1CC2(CCCCC2)Oc2cc(O)cc(O)c21, CCOC(=O)CCCBr to produce CCOC(=O)CCCOc1cc(O)c2c(c1)OC1(CCCCC1)CC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.