7α-methyl-3,3-dimethoxy-5(10)-estrene-17-one / Tibolone

7α-Methyl-3,3-dimethoxy-5(10)-estrene-17-one, related to the synthesis of tibolone (CAS 7511-49-1), is a pharmaceutical-grade chiral intermediate supplied by Shanghai Chematis Co., Ltd. under an in-house standard; the company does not manufacture it directly, and no samples are offered. It is distributed across a wide range of international markets.