Using CCOC(=O)Cc1c2c(nn1-c1ccccc1)c(=O)[nH]c1ccccc12 to produce O=C(O)Cc1c2c(nn1-c1ccccc1)c(=O)[nH]c1ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.