Using CCCCC(CNCCC(=O)O)C(=O)O, O=C(O)CN(CCN(CC(=O)O)CC(=O)O)CC(=O)O to produce CCCCC(CNCCC(=O)O)C(O)=[O+][O-], please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.