[Studies on chemical constituents of Eleutherine americana].

OBJECTIVE

To research the chemical constituents from Eleutherine americana.

METHODS

Column chromatography with silica gel was employed to isolate and purify the constituents. Their structures were elucidated by means of MS and NMR.

RESULTS

Eight constituents were obtained and identified as Isoeleutherol (1), eleutherin (2), isoeleutherin (3), beta-sitosterol(4), 8-hydroxy-3, 4-Dimethoxy-1-methyl-anthra-9, l0-quinone-2-carboxylic acid methyl ester (5), Hongconin (6), 4,8-Dihydroxy-3-Methoxy-1-methyl-anthra-9,10-quinone-2-carboxylic acid methyl ester (7), Eleutherinone (8), Kadsuric acid (9).

CONCLUSIONS

Compound 9 is isolated from the plant for the first time.