Using C=CC[Sn](CCCC)(CCCC)CCCC, COc1ccc(CN(c2nccs2)S(=O)(=O)c2ccc3c(c2)OCCN3c2ccc(C(F)(F)F)cc2Br)cc1 to produce C=CCc1cc(C(F)(F)F)ccc1N1CCOc2cc(S(=O)(=O)N(Cc3ccc(OC)cc3)c3nccs3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.