Patent ID: 7906678

Claim:
A crystalline potassium salt of 2-((2S,3R,4E,6E,10E,12S)-13-(4-fluorophenoxy)-2,3,12-trihydroxytrideca-4,6,10-trien-8-ynyloxy)acetate: which is in the form of an anhydrate characterized by a X-ray powder diffraction pattern having a characteristic peak at about d=26.7 Å; in the form of an anhydrate characterized by a X-ray powder diffraction pattern having a characteristic peak at about d=26.7 Å and about d=3.7 Å; in the form of a monohydrate characterized by a X-ray powder diffraction pattern having a characteristic peak at about d=26.5 Å; is in the form of a monohydrate characterized by a X-ray powder diffraction pattern having a characteristic peak at about d=26.5 Å, about d=4.3 Å and about d=4.0 Å; in the form of a dihydrate characterized by a X-ray powder diffraction pattern having a characteristic peak at about d=27.1 Å; or in the form of a dihydrate characterized by a X-ray powder diffraction pattern having a characteristic peak at about d=27.1 Å, about d=4.2 Å and about d=4.1 Å.