Isolation and Identification of Bioactive Constituents from Stem Barks of Illicium difengpi / 中草药·英文版

ABSTRACT

Objective: To isolate and identify bioactive constituents from the stem barks of Illicium difengpi. Methods: The chemical constituents were isolated and purified by repeated silica gel, Sephadex LH-20, recrystallization, and preparative HPLC techniques. The structures of the compounds were identified on the basis of spectral data including NMR, MS, and IR. Results: Two sesquiterpene lactones, majucin (1) and anisatin (2), two steroids, β-sitosterol (3) and daucosterol (4), three carboxylic acids, 2-ethyldecanoic acid (5), shikimic acid (6), and 3,4-dihydrobenzoic acid (7), and a flavonoid, quercetin (8), were successively isolated from the stem barks of I. difengpi. Conclusion: Apart from compound 3, other seven compounds are reported in this plant for the first time. The results suggested that the current studies on I. difengpi is still far from being well known and therefore more studies need to be done for better understanding of this plant. © 2014 Tianjin Press of Chinese Herbal Medicines.