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7A-HYDROXYPREGN-4-EN-3-ONE-20-CARBALDEHYDE, PROCESS FOR PRODUCING THE SAME AND PROCESS FOR PRODUCING 7A,21-DIHYDROXY-20-METHYLPREGN-4-EN-3-ONE FROM THE SAME
7A-HYDROXYPREGN-4-EN-3-ONE-20-CARBALDEHYDE, PROCESS FOR PRODUCING THE SAME AND PROCESS FOR PRODUCING 7A,21-DIHYDROXY-20-METHYLPREGN-4-EN-3-ONE FROM THE SAME
7α-Hydroxy-pregn-4-en-3-one-20-carbaldehyde, a production method thereof and a method for producing 7α,21-dihydroxy-20-methyl-pregn-4-en-3-one, which is useful as a synthetic intermediate for pharmaceuticals such as squalamine and the like, efficiently at high purity from the carbaldehyde.
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