Using O=c1c(-c2ccccc2)c(CN2CCOCC2)oc2ccc(Br)cc12 to produce O=c1c(-c2ccccc2)c(CN2CCOCC2)oc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.