发明人林芳,刘建华,罗永刚. "Method for the Synthesis of 4-PREGNEN-17, 21-DIOL-3, 11, 20-TRIONE 21-SULPHATE, SODIUM SALT" [P]. 中国发明专利, 专利号 CN 112243935 A, 授权公告日 2023-03-24.
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