Using CSc1sc(-c2ccccn2)c2c1C(=O)CC(C)(C)C2, CCOC=O to produce CSc1sc(-c2ccccn2)c2c1C(=O)C(=CO)C(C)(C)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.