Using COc1ccccc1CNc1ccc2c(Br)cccc2n1, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1cccc2nc(NCc3ccccc3OC)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.