Ulipristal Epoxy Compound

Chemical Name: (8'S,13'S,14'S,17'R)-13'-methyl-17'-(2-methyl-1,3-dioxolan-2-yl)-1',2',7',8',12',13',14',15',16',17'-decahydro-4'H,6'H-spiro[[1,3]dioxolane-2,3'-[5,10]epoxycyclopenta[a]phenanthren]-17'-ol