Using CCn1c(=O)c2c(NC)[nH]nc2n(Cc2ccc(C)cc2)c1=O, O=C([O-])[O-] to produce CCn1c(=O)c2c(NC)n(C)nc2n(Cc2ccc(C)cc2)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.