Using C1COCCO1, C=Cc1nc(-c2ccncc2)sc1-c1ncn(COCC[Si](C)(C)C)n1 to produce C[Si](C)(C)CCOCn1cnc(-c2sc(-c3ccncc3)nc2C=O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.