Using O=C(O)COCCOCCNC(=O)OCC1c2ccccc2-c2ccccc21, O=C1CCC(=O)N1O to produce O=C(COCCOCCNC(=O)OCC1c2ccccc2-c2ccccc21)ON1C(=O)CCC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.