Using C=C[Sn](CCCC)(CCCC)CCCC, CS(=O)(=O)c1ccc(C(CC2CCOCC2)c2ccc(-c3ccc(Br)cn3)[nH]2)cc1 to produce C=Cc1ccc(-c2ccc(C(CC3CCOCC3)c3ccc(S(C)(=O)=O)cc3)[nH]2)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.