Using COc1ccc(Br)c(CO[Si](C)(C)C(C)(C)C)c1, CCCCC([Sn])=C(CCCC)CCCC to produce C=Cc1ccc(OC)cc1CO[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.