Using CC(=O)OC(C)=O, CC(=O)c1cc2c(c(CN3CCN(C(=O)OC(C)(C)C)CC3)c1O)OCO2 to produce CC(=O)Oc1c(C(C)=O)cc2c(c1CN1CCN(C(=O)OC(C)(C)C)CC1)OCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.