Using COC(=O)C1COCCN1C(=O)OCC1c2ccccc2-c2ccccc21 to produce O=CC1COCCN1C(=O)OCC1c2ccccc2-c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.