Using COC(=O)[C@H](O)CO[C@@H](C)CO[Si](C(C)C)(C(C)C)C(C)C, Cc1cnc(N)cn1 to produce Cc1cnc(NC(=O)[C@@H](O)CO[C@H](C)CO[Si](C(C)C)(C(C)C)C(C)C)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.