Using Cc1nc2ccccn2c(=O)c1Br, O=Cc1cccc2c1OCO2 to produce O=c1c(Br)c(/C=C/c2cccc3c2OCO3)nc2ccccn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.