(R)-5,6-dihydro-4-hydroxy-6-methyl-2H-pyran-2-one

(4S,5R)-5-((S)-sec-Butyl)-4-[(E)-7-((R)-4-hydroxy-6-methyl-2-oxo-5,6-dihydro-2H-pyran-3-yl)-4-methylene-7-oxo-hept-1-enyl]-2,2-dimethyl-[1,3]dioxolane-4-carboxylic acid

(R)-3-{(E)-(R)-7-[(4R,5S)-4-((S)-sec-Butyl)-2,2-dimethyl-[1,3]dioxan-5-yl]-4-methyl-hept-6-enoyl}-4-hydroxy-6-methyl-5,6-dihydro-pyran-2-one