Modified steroid hormones. XLI. Rearrangement of 3 beta-acetoxy-4a alpha-hydroxy-5 beta-methyl-A-homo-B-nor steroids into normal steroids of the 6-methylene-5 beta-H series.

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• Shanghai Coupling Pharmaceutical R&D Co., Ltd.(expird)

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• TC CHEMICALS CO.,LTD

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• HUNAN CHEMAPI BIOLOGICAL TECHNOLOGY CO.,LTD.

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• Beijing Stable Chemcial Co.ltd

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  Address:A1301 Technological Edifice. No.4 FuFeng Road,FengTai District, Beijing. China

• Zibo Jujin Chemical Industry Co., Ltd.（Dongming Jujin Chemical Industry Co., Ltd. ）

  Contact:+86-533-2975022

  Address:No.99 Shanquan Road, Zhangdian District