Using O=C([O-])[O-], Cc1cccc(CC(=O)c2ccc3nccnc3c2)n1 to produce Cc1cccc(C(=O)C(=O)c2ccc3nccnc3c2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.