Definition: Fatty oil obtained from seeds of Oenothera biennis L. or Oenothera lamarckiana L. by extraction and/or expression.It is then refined.A suitable antioxidant may be added.

• 本品为柳叶菜科植物月见草Oenothera biennis L.；或红杆月见草Oenothera lamarckiana L