Compounds Useful In Therapy

Compounds of Formula (I): and pharmaceutically acceptable salts, solvates (including hydrates) of said compounds and salts, or prodrugs of said compound, or pharmaceutically acceptable salts or solvates of said prodrugs, wherein the substituents are as herein defined, are useful in therapy, for example they may be useful for treating progesterone-mediated conditions such as endometriosis, uterine fibroids (leiomyomata), menorrhagia, adenomyosis, primary and secondary dysmenorrhoea (including symptoms of dyspareunia, dyschexia and chronic pelvic pain), or chronic pelvic pain syndrome.