Using O=C(CN1CCCNCCN(CC(=O)OCc2ccccc2)CCCNCC1)OCc1ccccc1 to produce O=C(O)CN1CCCNCCN(CC(=O)O)CCCNCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.