Using Brc1ccc(OCc2ccccc2Oc2ccccc2)cn1, CCCC[Sn](/C=C/C(=O)OCC)(CCCC)CCCC to produce CCOC(=O)/C=C/c1ccc(OCc2ccccc2Oc2ccccc2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.