The present invention provides a compound having a steroid C
17,20
-lyase-inhibitory activity and useful for the therapy and prophylaxis of tumor such as prostatism, breast cancer and the like, and a method for efficiently separating an optically active compound of this compound from a mixture of optical isomers thereof, a compound of the formula:
1
wherein each symbol is as defined in the specification, a salt thereof or a prodrug thereof, and a method for obtaining an optically active compound by optically resolving a mixture of optical isomers by the use of a resolving agent such as tartranilic acid and the like.
本发明提供一种具有类
固醇C17,20-裂解酶抑制活性的化合物,用于治疗和预防前列腺癌、乳腺癌等肿瘤,以及一种有效地从其光学异构体混合物中分离出该化合物的光学活性化合物的方法,该化合物的
化学式为:1其中每个符号如规范中定义,其盐或前药,以及通过使用像
酞氨酸等分离剂对光学异构体混合物进行光学分离来获得光学活性化合物的方法。