[Triterpenoids and steroids of root of Rubus biflorus].
OBJECTIVE
To investigate the chemical constituents of root of Rubus biflorus.


METHODS
Isolation and purification were carried out by silica gel column chromatography and recrystallization and so on. Structural determination of the pure compounds was based on physico-chemical properties and various spectral data analysis (1H-NMR, 13C-NMR, IR, EI-MS).


RESULTS
Five compounds were isolated and identified as follows: lupeol acetate (I), corosolic acid (II), oleanic acid (III), 2alpha-hydroxyoleanolic acid (IV), sitosterol (V).


CONCLUSIONS
All these compounds are isolated from this plant for the first time.
Kang
Shu-He
SH
School of Chemical Engineering, Northwest Minorities University, Lanzhou 730030, China. kangshuhe@163.com
Shi
Yong-Qing
YQ
Yang
Cai-Xia
CX
D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D027824:Rosaceae / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D012855:Sitosterols; D013256:Steroids; D014315:Triterpenes; C025473:gamma-sitosterol; D009828:Oleanolic Acid; C113861:corosolic acid; C412811:maslinic acid