Using CCCC[Sn](CCCC)(CCCC)c1cccc(NC(=O)/C=C\C(=O)O)c1 to produce CCCC[Sn](CCCC)(CCCC)c1cccc(N2C(=O)C=CC2=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.