Using CCOC(=O)c1sc2cc(OCc3cccnc3)ccc2c1Sc1ccccc1 to produce O=C(O)c1sc2cc(OCc3cccnc3)ccc2c1Sc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.