Using CCn1ncc2c(-c3ccc(Cl)s3)c(CO)c(C(C)C)nc21 to produce CCn1ncc2c(-c3ccc(Cl)s3)c(C=O)c(C(C)C)nc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.