Using O=C(O)c1cc(/C=C/c2cn3ccnc(N4CCOCC4)c3n2)nc2ccccc12 to produce O=C([O-])c1cc(/C=C/c2cn3ccnc(N4CCOCC4)c3n2)nc2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.