6-methyl-4-piperidin-1-ylpyran-2-one

4-hydroxy-3-methoxy-6-methylpyran-2-one

4-hydroxy-6-methyl-2-oxopyran-3-carbonitrile

2,2,7-trimethyl-3,4-dihydropyrano[3,2-c]pyran-5-one

4-(4-methoxyphenyl)-6-methylpyran-2-one