THE USE OF 1,3,4,6-TETRAHYDROXY-HELIANTHRONE AND ITS DERIVATIVES IN PHOTODYNAMIC THERAPY AND CERTAIN SUCH NOVEL DERIVATIVES

摘要

A method for treating cancer comprising administering a 1,3,4,6-tetrahydroxy-helianthrone derivative. The compounds can be used in the absence of light irradiation or for photodynamic therapy of solid tumors wherein the tumor site is subjected to light irradiation after administration of the active ingredient. A preferred compound is 10,13-dimethyl-1,3,4,6-tetrahydroxy-helianthrone.