Using C=C[Sn](CCCC)(CCCC)CCCC, CCC1Oc2c(ccc(Br)c2CCCN)N1C(=O)OC(C)(C)C to produce C=Cc1ccc2c(c1CCCN)OC(CC)N2C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.