[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.
Liu
Xi-jing
XJ
Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China. lxj_1975@yahoo.com.cn
Yan
Xi-qing
XQ
Wang
Nai-li
NL
D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D027621:Iridaceae / Q000737:chemistry*; D015394:Molecular Structure; D009285:Naphthoquinones / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D013055:Spectrophotometry, Infrared
D000880:Anthraquinones; D009285:Naphthoquinones; D012855:Sitosterols; C478365:eleutherinone