Using C=C[Sn](CCCC)(CCCC)CCCC, CCOC(=O)c1oc2cccc(OS(=O)(=O)C(F)(F)F)c2c1C to produce C=Cc1cccc2oc(C(=O)OCC)c(C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.