Using CCOC(Cc1ccc(OCCN2c3ccccc3Sc3ccccc32)cc1)C(=O)OC to produce CCOC(Cc1ccc(OCCN2c3ccccc3Sc3ccccc32)cc1)C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.