Using O=C(COC(=O)COCc1ccccc1)NCCCCCCNC(=O)COC(=O)COCc1ccccc1 to produce O=C(COC(=O)CO)NCCCCCCNC(=O)COC(=O)CO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.