Chemical constituents from Rhododendron anthopogonoides / 中草药

ABSTRACT

Objective: To study the chemical compositions of Rhododendron anthopogonoides. Methods: The chemical constituents were isolated from R. anthopogonoides by Sephadex LH-20, MCI, silica gel column chromatography, and preparative-HPLC. The structures were assigned by physicochemical property and spectroscopic data. Results: Ten compounds have been isolated from R. anthopogonoides and their structures were indentified as caffeic acid (1), trans-ferulic acid (2), kaempferol (3), dihydroquercetin (4), noreugenin (5), 4-(3,4-dihydroxyphenyl)-2-butanone (6), 3,5-dihydroxy toluene (7), ursolic acid (8), ethyl 3,4-dihydroxybenzoate (9), and procurcumenol (10). Conclusion: Compounds 1-3, 5-7, 9, and 10 are obtained from R. anthopogonoides for the first time. Compounds 2,6,9, and 10 are obtained from the plants of Rhododendron L. for the first time.