Using CCCC[Sn](CCCC)(CCCC)/C(=C/C(=O)OC)CCCCCCCCOC1CCCCO1 to produce COC(=O)/C=C(CCCCCCCCOC1CCCCO1)/C(=C/C(=O)OC)CCCCCCCCOC1CCCCO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.