Using COC(C)(C)OC, COC(=O)c1ccc2cc(OC[C@@H](O)CO)ccc2c1 to produce COC(=O)c1ccc2cc(OC[C@@H]3COC(C)(C)O3)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.