Using CCCCOc1nc(N)c2nc(OC)n(CCCN3C(=O)c4ccccc4C3=O)c2n1 to produce CCCCOc1nc(N)c2nc(OC)n(CCCN)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.