RESUMEN
Objective: To study the chemical constituents from the inflorescence bracts of Arctii Fructus. Methods: The compounds were isolated and purified by the methods of silica gel column chromatography, HPLC, and recrystallization, and the structures were elucidated by the means of spectral analysis. Results: Twelve compounds were isolated and identified as daucosterol (1), isofouquierol (2), (22E)-5α, 8-epidioxyergosta-6, 22-dien-3β-ol (3), 3β-hydroxy-21, 22-epoxyursa-20(30)-en (4), 3β, 21β-dihydroxy-20(30)-en-taraxastane (5), oleanolic acid (6), arctigenin (7), carthamogenin (8), caffeic acid (9), 4(14)-eudesmene-8α, 11-diol (10), monogynol A (11), and lupeol (12). Conclusion; Compounds 2-3, 5, 6, 10-11 are obtained from the plants of Arctium L. for the first time, and compound 12 is isolated from the inflorescence bracts of Arctii Fructus for the first time.