Using COCOc1cnccc1C(O)c1ccc(CCOC(=O)c2ccccc2)cc1 to produce O=C(OCCc1ccc(Cc2ccncc2O)cc1)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.