6-hydroxy-2-methyl-2H-pyran-3(6H)-one

3-bromo-6-methoxy-2-methyl-3,6-dihydro-2H-pyran

methyl 2,3,6-trideoxy-α-DL-threo-hex-2-enopyranoside

2-methylthio-5-oxohexanoic acid

6-methyl-3-(methylthio)-3,4-dihydro-2H-pyran-2-one