Using O=C(O)c1cc(-n2c(-c3ccccc3)cc3c2CCCC3)ccc1O to produce O=C(O)c1cc(-n2c(-c3ccccc3)cc3ccccc32)ccc1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.