首先是双氢偏诺皂甙元的合成研究。

There are three main parts:First, the study of synthesis of dihydropennogenin.

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这种药物抑制双氢睾酮的形成，这是主要原因脱发。

This drug inhibits formation of DHT, which is the main cause of hair loss.

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这种药物抑制双氢睾酮的形成，这是主要原因脱发。

This drug inhibits formation of DHT, which is the main cause of hair loss.

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