Using CCOC(=O)c1cnc(C(=O)c2cccc(OC(C)C)c2)c2cc(OC)c(O)cc12, OCCCBr to produce CCOC(=O)c1cnc(C(=O)c2cccc(OC(C)C)c2)c2cc(OC)c(OCCCO)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.