Using CCCCn1c(-c2cc(OC)c(OC)c(OC)c2Br)nc2sc3c(O)cc(C)cc3c2c1=O to produce CCCCn1c(-c2cc(OC)c(OC)c(O)c2Br)nc2sc3c(O)cc(C)cc3c2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.