Using O=C([O-])[O-], O=C(O)c1cnc2c(n1)c(-c1ccc3ccccc3c1)nn2Cc1ccccc1 to produce COC(=O)c1cnc2c(n1)c(-c1ccc3ccccc3c1)nn2Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.