Using OCCCBr, COc1cc2c(Oc3ccc(NC(=O)OC(C)(C)C)cc3F)ccnc2cc1O to produce COc1cc2c(Oc3ccc(NC(=O)OC(C)(C)C)cc3F)ccnc2cc1OCCCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.