| abstract |
(57) [Problem] To provide a steroid sulfatase inhibitor comprising a thiophosphate derivative or a pharmaceutically acceptable salt thereof as an active ingredient. SOLUTION: Formula (I) (Wherein R 1 and R 2 are the same or different and each represent a hydrogen atom or a substituted or unsubstituted lower alkyl; -R 3 represents a residue of a monocyclic alcohol or a residue of a polycyclic alcohol), or a steroid sulfatase inhibitor containing, as an active ingredient, a thiophosphate derivative represented by the formula: For example, the above equation In (I), R 1 and R 2 are hydrogen atoms, and -R 3 is a group represented by the formula (A) Or a pharmaceutically acceptable salt thereof. |