Using O=C(Nc1ccc(C2=CCNCC2)cc1)N1Cc2ccncc2C1 to produce O=C(Nc1ccc(C2CCNCC2)cc1)N1Cc2ccncc2C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.