Using C[Si](C)(C)CCOCCl, CCOC(=O)c1c(C)[nH]c2ncc(-c3cc(OC)c(OC)c(OC)c3)nc12 to produce CCOC(=O)c1c(C)n(COCC[Si](C)(C)C)c2ncc(-c3cc(OC)c(OC)c(OC)c3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.