Using COc1ccc2c(C)c(-c3cnc(OC)nc3OC)c(=O)oc2c1, O=C1CCC(=O)N1Br to produce COc1ccc2c(CBr)c(-c3cnc(OC)nc3OC)c(=O)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.