Using COB(OC)OC, COc1ccc2c(ccn2[Si](C(C)C)(C(C)C)C(C)C)n1 to produce COB(O)c1cc2c(ccn2[Si](C(C)C)(C(C)C)C(C)C)nc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.