Using C=COCC, C=CC(O)C(NC(=O)OC(C)(C)C)c1ccccc1 to produce C=CC(OC(C)OCC)C(NC(=O)OC(C)(C)C)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.