[Studies on the triterpenoidal saponins from flowers of Eriobotrya japonica].
OBJECTIVE
To investigate the chemical composition of the flowers of Eriobotrya japonica.


METHODS
Four constituents were isolated from the ethanolic extracts of flowers of Eriobotrya japonica (Thunb) Lindl and were identified by chemical methods and spectroscopic (IR, MS, 1HNMR, 13CNMR).


RESULTS
The structures were identified as: Oleanolic acid (I), Ursolic acid(II), 2 alpha, 3 alpha, 19 alpha-Trihydroxyurs-5,12-dien-28-acid (III) and 2 beta, 3 beta, 23 alpha-Trihydroxyolean-12-en-28-acid (IV).


CONCLUSIONS
The compounds I, II, III and IV were obtained from the flowers of Eriobotrya japonica for the first time.
Cheng
L
L
Department of Organic Chemistry, School of Pharmacy, WCUMS, Chengdu 610041, China.
Liu
Y
Y
Chen
L
L
Luo
J
J
D031983:Eriobotrya / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000737:chemistry / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000097245:Ursolic Acid
D009828:Oleanolic Acid; D012503:Saponins; D014315:Triterpenes; D000097245:Ursolic Acid