Using Cn1cc([C@@H](CC=O)COC(=O)c2ccccc2)c2ccccc21, OCCO to produce Cn1cc([C@H](COC(=O)c2ccccc2)CC2OCCO2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.