...Substituents are mainly limited to the 3rd position of the A ring, the 11th position of the C ring, and the 17th position of the D ring. The most common steroids are alcohols with a hydroxyl group at the 3rd position, collectively known as sterols or sterins. The most abundant steroid in animal tissues is cholesterol (Figure 3), which exists either free or as an ester of a long-chain fatty acid with the hydroxyl group at the 3rd position. ... *Some of the terminology that mentions "Sterin" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…置換基は主としてA環の3位,C環の11位,D環の17位に限られている。 最も普遍的に存在するものは3位に水酸基をもつアルコールで,これはステロールsterolあるいはステリンSterinと総称される。動物組織に最も大量にあるステロイドはコレステロール(図3)で,遊離または3位の水酸基の長鎖脂肪酸のエステルの形で存在する。… ※「Sterin」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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