Using O=C1CCCc2cnc(SCc3ccccc3)nc21, CCOC(=O)C(=O)c1ccccc1 to produce O=C(C(=O)C1CCc2cnc(SCc3ccccc3)nc2C1=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.