Using COc1c2c(c(Br)n(C)c1=O)CCN(Cc1ccc(F)c(Cl)c1)C2=O, C=C[Sn](CCCC)(CCCC)CCCC to produce CCc1c2c(c(OC)c(=O)n1C)C(=O)N(Cc1ccc(F)c(Cl)c1)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.