The invention relates to compounds of formula (I) and pharmaceutically acceptable salts thereof wherein R1 to R4 are as defined in the claims. The invention further relates to their use as inhibitors of 17β-HSD1 and in treatment or prevention of steroid hormone dependent diseases or disorders, such as steroid hormone dependent diseases or disorders requiring the inhibition of the 17β-HSD1 enzyme and/or requiring the lowering of the endogenous estradiol concentration. The present invention also relates to the preparation of the aforementioned compounds and to pharmaceutical compositions comprising as an active ingredient(s) one or more of the aforementioned compounds or pharmaceutically acceptable salts thereof.
本发明涉及式(I)化合物及其药学上可接受的盐,其中 R1 至 R4 如权利要求中定义。本发明还涉及它们作为 17β-H
SD1
抑制剂和在治疗或预防类
固醇激素依赖性疾病或紊乱中的用途,例如需要抑制 17β-H
SD1 酶和/或需要降低内源性
雌二醇浓度的类
固醇激素依赖性疾病或紊乱。本发明还涉及上述化合物的制备,以及包含一种或多种上述化合物或其药学上可接受的盐作为活性成分的药物组合物。