Moreover, those impurities, as menthone, isomenthone, limonene, 1, 8-cineol and bata-pinene contents of Hai-Xuan mint are lower than that of 73-8mint.

原中薄荷、异薄荷、烯、1,8-桉叶素、β-蒎烯等均低于“73～8”。

Limonene: Occurs in various oils such as Levant wormseed oil, pine needle oil and other oils.

出现在各种如Levant土荆芥、松针和其他中。

Limonene needed in recycling foamed polystyrene was extracted from the ear of schizonepeta tenuifolia using ligroin.

本文荆芥穗中提取回收聚苯乙烯所需的烯,其方法是溶剂萃取。