Using O=C1c2ccccc2C(=O)N1CCn1cncc1-c1ccnc(Nc2cccc(Cl)c2)n1 to produce NCCn1cncc1-c1ccnc(Nc2cccc(Cl)c2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.