Cyclic N,N′-diarylthiourea—androgen receptor antagonist, anti breast cancer composition and use thereof

The present invention relates to novel cyclic N,N′-diarylurea—androgen receptor antagonist, anti-cancer agent, pharmaceutical composition, medicament, and method for treatment of breast cancer disease. Cyclic N,N′-diarylthioureas or N,N′-diarylureas of the general formula 1, their optical (R)- and (S)-isomers and pharmaceutically acceptable salts thereof exhibiting properties of androgen receptor antagonists have been proposed, wherein: R1 represents C 1 -C 3 alkyl; R4 and R5 represent hydrogen; or R4 represents hydrogen, R5 represents methyl; or R4 represents methyl, R5 represents CH 2 R6 group in which R6 is C 1 -C 3 alkoxycarbonyl, carboxyl, hydroxyl group optionally substituted with methyl or benzyl; or R4 and R5 together with the carbon atom they are attached to form 5- or 6-membered saturated heterocycle including at least one oxygen atom or nitrogen atom optionally substituted with methyl.