Using CCOC(=O)c1c(C)nc(C(C)C)n1COCC[Si](C)(C)C to produce Cc1nc(C(C)C)n(COCC[Si](C)(C)C)c1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.