Using COc1cc(C2C(C#N)=COC3C4=CC=NC4=CC=C32)cc(Br)c1OC, CCBr to produce CCn1ccc2c3c(ccc21)C(c1cc(Br)c(OC)c(OC)c1)C(C#N)=CO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.