Using C=CCBr, O=c1[nH]c2ccc(Cl)nc2n1-c1ccc2c(c1)OCO2 to produce C=CCn1c(=O)n(-c2ccc3c(c2)OCO3)c2nc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.