Using CCOC(C)=O, CC(=O)Nc1ccc2c(c1)OC[C@H]1[C@H](CO[Si](C)(C)C(C)(C)C)OC(=O)N21 to produce CC(=O)N(C)c1ccc2c(c1)OC[C@H]1[C@H](CO[Si](C)(C)C(C)(C)C)OC(=O)N21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.