(5Z)-7-((1R,2R, 3R,5S)-2-((1E)-3,3-difluoro-4-phenoxy -1-butenyl)-3,5-dihydroxycyclopentyl)-5-heptenoic acid
(5z)-7-((1r,2r, 3r,5s)-2-((1e)-3,3-difluoro-4-phenoxy -1-butenyl)-3,5-dihydroxycyclopentyl)-5-heptenoic acid