2-(1-hydroxyethyl)-2,3,5-trimethoxy-2,5-dihydrofuran

3-((tert-butyldimethylsilyl)oxy)-2-methyl-4H-pyran-4-one

4-chloro-6-methoxy-2-methyl-2H-pyran-3(6H)-one

2-methoxy-3,4-dichloro-6-methyl tetrahydropyran-5-one

2-methyl-3-((triisopropylsilyl)oxy)-4H-pyran-4-one