Physicochemical properties of crystalline forms of ethynylestradiol solvates: comparison of thermal behavior with X-ray crystal structure.


Four crystalline forms of ethynylestradiol solvates were obtained from three solvents [acetonitrile (Form A), methanol (Form B), and chloroform saturated with water (Forms C and D)], and were characterized by X-ray powder patterns and thermal analyses. The crystal structures of Forms A, B, and C were further analyzed using the X-ray diffraction method, and… (More)


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