Using CN1CCN(Cc2nnc(-c3cnc(NCCc4ccncc4)nc3OCC[Si](C)(C)C)o2)CC1 to produce CN1CCN(Cc2nnc(-c3cnc(NCCc4ccncc4)nc3O)o2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.