(E)-6-[5-((2E,4E)-2,5-Dimethyl-octa-2,4-dienoyl)-4-hydroxy-6-oxo-6H-pyran-2-yl]-hept-2-enoic acid methyl ester

(E)-6-(4-Hydroxy-6-oxo-5-propionyl-6H-pyran-2-yl)-hept-2-enoic acid

(E)-6-[5-((E)-3-Chloro-2,5-dimethyl-non-4-enoyl)-4-hydroxy-6-oxo-6H-pyran-2-yl]-hept-2-enoic acid methyl ester

(E)-6-[4-Hydroxy-5-((E)-3-hydroxy-2,5-dimethyl-non-4-enoyl)-6-oxo-6H-pyran-2-yl]-hept-2-enoic acid methyl ester