Using O=C1NC2(CCCN(Cc3ccccc3)C2)n2c1ccc(Nc1ccncn1)c2=O to produce O=C1NC2(CCCNC2)n2c1ccc(Nc1ccncn1)c2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.