Using Nc1c(C(=O)c2cccc(Br)c2)cnn1-c1ccc(F)cc1, C=C(OCC)[Sn](CCCC)(CCCC)CCCC to produce C=C(OCC)c1cccc(C(=O)c2cnn(-c3ccc(F)cc3)c2N)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.