Using COc1nc2cc([N+](=O)[O-])cc(Br)c2nc1OC, CCCCC([SnH3])=C(CCCC)CCCC to produce C=Cc1cc([N+](=O)[O-])cc2nc(OC)c(OC)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.