Using C=CCN(CC=C)c1nc(NC(=O)OCC(C)C)[n+]([O-])c(NC(=O)OCC(C)C)n1 to produce C=CCN(CC=C)c1nc(NC(=O)OCC(C)C)n2oc(=O)nc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.