Using COCCn1c(-c2ccc(C(C)C)cc2)nc2c(C#C[Si](C)(C)C)ccc(OC)c21 to produce C#Cc1ccc(OC)c2c1nc(-c1ccc(C(C)C)cc1)n2CCOC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.