oleosterol

例句：

1. 1. The oily substance is a natural source of vitamin D.
   这种油性物质是维生素D的自然来源。
2. 2. The oleosterol in the plant extract has been shown to have anti-inflammatory properties.
   植物提取物中的油酸甾醇已被证明具有抗炎性质。
3. 3.The oleosterol in this oil is believed to have health benefits for the skin.
   这种油中的油酸甾醇被认为对皮肤有益。