In fact, once Catlin and his U.C.L.A. colleagues had deduced the structure of THG, they re-created it by hydrogenating (adding hydrogen atoms to) gestrinone, which yielded tetrahydrogestrinone.

• 事实上，卡特林和加州大学洛杉矶分校的同仁便曾推导出THG的结构，当时他们将氢原子附加于孕三烯酮上使之氢化，而重制出THG。