Using CC(C)(C)[Si](C)(C)OCC=O, Cc1nc(-c2cn3c(n2)-c2ccc(-c4cnn(C5CNC5)c4)cc2OCC3)n(C(C)C)n1 to produce Cc1nc(-c2cn3c(n2)-c2ccc(-c4cnn(C5CN(CCO[Si](C)(C)C(C)(C)C)C5)c4)cc2OCC3)n(C(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.