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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 1
BKCSDE 27(1)
January 20, 2006 

New Stigmastane Steroids Constituents from Rice Hulls of Oryza sativa and Inhibitory Activity on Radish seed
Ill-Min Chung, Mohd Ali, Tran Dang Khanh, Myoung Gun Choung, Hong Jae Park, Ateeque Ahmad*
Oryza sativa L., Poaceae, Rice hull compounds, 1'-(Stigmast-11,20(21),25-trien-3α,9α-diolyl)-3'-(pimara-11,15-dien-3α-olyl) glycerol, Stigmast-5-en-3α,26-diol
Two new compounds 1'-(stigmast-11,20(21),25-trien-3α,9α-diolyl)-3'-(pimara-11,15-dien-3α-olyl) glycerol (1) and stigmast-5-en-3α,26-diol (2) along with known fatty acids n-hexacosanoic acid (3) and hexadecanoic acid (4), have been isolated from the methanol extract of rice hulls of Oryza sativa. The structures of the compounds were elucidated using 1D and 2D NMR spectral methods, viz; 1H, 13C, 13C-DEPT, 1H-1H COSY, 1H-13C HETCOR, HSQC and HMBC aided by IR, EIMS, FABMS and HRFABMS. Compound (1) showed inhibition to radish germination, growth of shoot and root length.
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