Using CCOC(=O)c1cc2nc(N3CCCC3)cc(NC3CCOCC3)n2n1 to produce O=C(O)c1cc2nc(N3CCCC3)cc(NC3CCOCC3)n2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.