Bilobalide in leaves had a high ratio of total terpene lactone.

叶片中的双叶利德具有很高的总萜内酯比例。

The Saussurea involucrata chemical composition was: alkaloid, flavanone, sterol, volatile oil, 16 kind of amino acids, Saussurea involucrata lactone and so on.

雪莲化学成分为：生物碱、黄酮、甾醇、挥发油、16种氨基酸、雪莲内酯等。

The polymer may contain a lactone structure.

聚合物是含有内酯结构的聚合物。

This is the large ring lactone class antibiotic.

本品为大环内酯类抗生素。

American oak is much higher in lactone concentrations.

是在高于美国橡木桶内酯的含量。