Using COc1ccc(Cn2c(=O)n3ncnc3c3c(C)csc32)cc1, O=C([O-])[O-] to produce COc1ccc(Cn2c(=O)n3ncnc3c3c(C)c(C=O)sc32)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.