A remarkably simple, highly efficient, and stereoselective synthesis of steroids and other polycyclic systems. Total synthesis of Estra-1,3,5(10)-trien-17-one via intramolecular capture of o-quinodimethanes generated by cheletropic elimination of SO2

R&D Labs maybe for 7647-47-4

• Kaiping Genuine Biochemical Pharmaceutical Co.,Ltd.

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

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• C-LAB Chemievermittlung GmbH

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• Taizhou Crene Biotechnology co.ltd

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