PHENYLMETHYL (5Z,11.ALPHA.)-16,16-DIFLUORO-9,15-DIOXO-11-((TETRAHYDRO-2H-PYRAN-2-YL)OXY)PROST-5-EN-1-OATE
phenylmethyl (5z,11.alpha.)-16,16-difluoro-9,15-dioxo-11-((tetrahydro-2h-pyran-2-yl)oxy)prost-5-en-1-oate