Using C[Si](C)(C)CCOCn1cc(-c2ccccc2CCO)c2c(Cl)c(Br)cnc21 to produce Brc1cnc2[nH]cc3c2c1OC1=C3C=CC=CCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.