3-(dimethylaminomethylidene)-6-methylpyran-2,4-dione

6-methyl-4-[4-(2-methyl-6-oxopyran-4-yl)oxybutoxy]pyran-2-one

6-methyl-4-[3-(2-methyl-6-oxopyran-4-yl)oxypropoxy]pyran-2-one

6-甲基-2,4-双(甲基硫代)-3-硝基吡啶

4-chloro-6-methylpyran-2-one