| abstract |
(57) Abstract: A preparation for suppressing estrogen-positive tumors of the brain or CNS is provided. SOLUTION: Formula (I): [Wherein R 1 and R 3 are independently hydrogen, —CH 3 , Or [Chemical 3] (Ar is optionally substituted phenyl) and R 2 is selected from the group consisting of pyrrolidino, hexamethyleneimino, and piperidino], or a pharmaceutically acceptable salt or solvate thereof. A formulation comprising a substance. |