[Studies on chemical constituents of Eleutherine americana].
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Рэферат
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.