EP1466902A1 — Androgen receptor antagonists

USPTO Abstract

The present invention provides an androgen receptor antagonistic agent and a superior prophylactic or therapeutic agent for hormone-sensitive cancer, which contain a compound of the formula: wherein, R 1 is a hydrogen atom, a group binding through a carbon atom, a group binding through a nitrogen atom, a group binding through an oxygen atom or a group binding through a sulfur atom; R 2 is a hydrogen atom, a group binding through a carbon atom, a group binding through a nitrogen atom, a group binding through an oxygen atom or a group binding through a sulfur atom, R 3 is a hydrogen atom, a hydrocarbon group which may have substituent (s) , an acyl group or a heterocyclic group which may have substituent(s), R 4 is a hydrogen atom, a group binding through a carbon atom, a group binding through a nitrogen atom, a group binding through an oxygen atom or a group binding through a sulfur atom, and R 5 is a cyclic group which may have substituent(s); or a salt thereof, or its prodrug.