Chemical constituent analysis of EtOAc fraction of Tithonia diversifolia (HEMSL.) A. Gray / 第二军医大学学报

ABSTRACT

Objective: To isolate and identify the chemical constituents of the EtOAc fraction of Tithonia diversifolia. Methods: The dried aerial parts of Tithonia diversifolia were extracted with 80% EtOH,and the chemical constituents of the ethyl acetate portion from the extract were isolated by column chromatography with silica gel, Sephadex LH-20 and MCI. The isolated compounds were identified by NMR and MS analysis. Results: Ten compounds were isolated from EtOAc extract, and identified as, vanillin (1), ergosterol (2), ergosterol peroxide (3), 3-methoxy-4-hydroxy-trans-cinnamaldehyde (4), 3-hydroxybenzaldehyde (5), 7-methylesculetin (6) , 5-hydyoxymethyl furfural (7), nepetin (8) , docosanoic acid 2, 3-dihydroxypropyl ester(9) and 13-hydroxyeupatorochromene(10). Conclusion: Vanillin, ergosterol, ergosterol peroxide, 3-methoxy-4-hydroxy- trans-cinnamaldehyde, p-hydroxybenzaldehyde, 7-methylesculetin, 5-hydyoxymethyl furfural, docosanoic acid 2, 3-dihydroxypropyl ester, and 13- hydroxyeupatorochromene have been isolated from Tithonia diversifolia for the first time.