Using O=C(O)Cc1ccc(-c2cccc(CN3Cc4ccccc4C3)c2)cc1 to produce OCCc1ccc(-c2cccc(CN3Cc4ccccc4C3)c2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.