hemiterpene

…Terpenes with n 3 or more are also known in nature, with n = 3 being called sesquiterpenes, n = 4 being called diterpenes, n = 5 being called sesterterpenes, and n = 6 being called triterpenes. Terpenes with n ≧ 8 are sometimes called polyterpenes, and isoprene itself is thought to belong to the hemiterpene group with n = 1. Many higher terpenes are also important as aroma components, pigments, and resin components. …

*Some of the terminology explanations that mention "hemiterpene" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…天然にはnが3以上のテルペンも知られており，n＝3をセスキテルペンsesquiterpene,n＝4をジテルペンditerpene,n＝5をセスタテルペンsesterterpene,n＝6をトリテルペンtriterpeneなどと呼ぶ。n≧8の場合をポリテルペンpolyterpeneと呼ぶことがあり，またイソプレン自身はn＝1のヘミテルペンhemiterpeneに属すると考えられる。高次のテルペンも香気成分，色素，樹脂成分等として重要なものが多い。…

※「hemiterpene」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。

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