Using CCn1c(=O)n(C2CCN(CC(=O)c3ccc4c(c3)OCO4)CC2)c2ccccc21 to produce CCn1c(=O)n(C2CCN(CC(O)c3ccc4c(c3)OCO4)CC2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.