Using OCCBr, CCN1C(=O)CNCc2ccc(Nc3ncc(Cl)c(Nc4c(F)cccc4C(=O)NC)n3)cc21 to produce CCN1C(=O)CN(CCO)Cc2ccc(Nc3ncc(Cl)c(Nc4c(F)cccc4C(=O)NC)n3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.