Using COC[C@H]1O[C@@H](n2cnc3c(NCC(c4ccccc4)c4ccccc4)nc(COS(C)(=O)=O)nc32)[C@H](O[Si](C)(C)C(C)(C)C)[C@@H]1O[Si](C)(C)C(C)(C)C, [C-]#N to produce COC[C@H]1O[C@@H](n2cnc3c(NCC(c4ccccc4)c4ccccc4)nc(CC#N)nc32)[C@H](O[Si](C)(C)C(C)(C)C)[C@@H]1O[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.