Using C=CCCCCCC(=O)CC(=O)OCC, FC(F)(F)C(F)(F)CCCI to produce C=CCCCCCC(=O)C(CCCC(F)(F)C(F)(F)F)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.