(1S,6S)-5β-Hydroxy-3-[(R)-1-hydroxy-3-methyl-2-butenyl]-7-oxabicyclo[4.1.0]hept-3-en-2-one

(1β,6β)-3-[(1R)-1-Hydroxy-3-methyl-2-butenyl]-5β-hydroxy-7-oxabicyclo[4.1.0]hepta-3-ene-2-one