Using OC(c1ccccc1)c1nn2ccccc2c1-c1ccnc(NC2CCCC2)n1 to produce O=C(c1ccccc1)c1nn2ccccc2c1-c1ccnc(NC2CCCC2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.