Compounds of general Formula I in which the substituents of R 1 -R 7 are hydrogen, hydroxy group, C 1-6 alkyl group, C 1-6 alkoxy group, or epoxypropoxy, but at the most, six of the substituents can simultaneously be hydrogen, methoxy group, or hydroxy group, or epoxypropoxy group for activity against hepatoma. There are also described processes for the preparation of the novel compounds and useful intermediates. Substitute benzophenones are described.

Compounds for the treatment of hepatoma

The invention discloses mangiferin aglycone crystal form I. X-ray powder diffraction analysis, DSC analysis, TG-DTA analysis, IR analysis and HPLC analysis show that mangiferin aglycone crystal form I is a new crystal form. Mangiferin aglycone crystal form I in comparison with existing mangiferin aglycone has high purity, high stability in light, humidity and heat, high bioavailability. The invention also provides preparation method, pharmaceutical composition and pharmaceutically acceptable carrier of mangiferin aglycone crystal form I.

Hayashi Tadao

Papers

New xanthone compound