Using CCO, Cn1c(S)nnc1-c1ccn(COCC[Si](C)(C)C)c(=O)c1 to produce CSc1nnc(-c2ccn(COCC[Si](C)(C)C)c(=O)c2)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.