Using CCCC[Sn](CCCC)(CCCC)C(=CC1(O)CCCN(Cc2ccccc2)C1)CO to produce CCCC[Sn](CCCC)(CCCC)C1=CC2(CCCN(Cc3ccccc3)C2)OC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.