Using COc1cc(-c2cnc3c(n2)c(C(=O)C2(C)CC2)cn3[Si](C(C)C)(C(C)C)C(C)C)cc(OC)c1OC to produce COc1cc(-c2cnc3[nH]cc(C(=O)C4(C)CC4)c3n2)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.