Using CCOC(=O)Cn1c(=S)n(Cc2ccccc2)c(=O)c2ccccc21 to produce O=C(O)Cn1c(=S)n(Cc2ccccc2)c(=O)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.