(5Z,9.ALPHA.,11.ALPHA.)-16,16-DIFLUORO-9,15-DIHYDROXY-11-((TETRAHYDRO-2H-PYRAN-2-YL)OXY)PROST-5-EN-1-OIC ACID
(5z,9.alpha.,11.alpha.)-16,16-difluoro-9,15-dihydroxy-11-((tetrahydro-2h-pyran-2-yl)oxy)prost-5-en-1-oic acid