Using C1CCOC1, C[Si](C)(C)CCOCn1c2cnc(C#N)cc2c2c(Cl)ccnc21 to produce C[Si](C)(C)CCOCn1c2cnc(C#N)cc2c2c(O)ccnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.