Chemical constituents from leaves of allelopathic cultivar sunflower in China.

The article presents a study which examines the chemical constituents of Helianthus annuus L., an allelopathic cultivar sunflower in China. It discusses the isolation and characterization of the eight compounds from the isolated methanolic extracts of the Helianthus annuus L. leaves. It states that the leaves were collected in Wuzhong City, Ningxia Province and were identified by Mr. Z. H. Wu at Northwest Institute of Botany in Yangling, Shaanxi Province.