Using C[Si](C)(C)CCOCn1ccc2c(-c3cnn(C(CC=O)c4cccc(Br)c4)c3)ncnc21, CC(C)(C)[O-] to produce C=CCC(c1cccc(Br)c1)n1cc(-c2ncnc3c2ccn3COCC[Si](C)(C)C)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.