(3aR,4R,5R,6S)-Hexahydro-5-hydroxy-4-[(1E,3R)-3-hydroxy-4-[3-(trifluoromethyl)phenoxy]-1-butenyl]-,2H-cyclopenta[b]furan-2-one; 3aR-[3aα,4α(1E,3R*),5 β,6aα]]-Hexahydro-5-hydroxy-4-[3-hydroxy-4-[3-(trifluoromethyl)phenoxy]-1-butenyl]-2H-cyclopenta[b]furan-2-one; (3aR,4R,5R,6S)-4-[(R,E)-4-[3-(Trifluoromethyl)phenoxy]-3-hydroxybut-1-enyl]hexahydro-5-hydroxycyclopenta[b]furan-2-one