Chemical constituents of rice (Oryza sativa) hulls and their herbicidal activity against duckweed (Lemna paucicostata Hegelm 381).
Four new compounds, stigmastanol-3beta-p-glyceroxydihydrocoumaroate (1), stigmastanol-3beta-p-butanoxydihydrocoumaroate (2), lanast-7,9(11)-dien-3alpha,15alpha-diol-3alpha-D-glucofuranoside (3) and 1-phenyl-2-hydroxy-3,7-dimethyl-11-aldehydic-tetradecane-2-beta-D-glucopyranoside (4), along with several known compounds were isolated from the methanol extract of hulls of Oryza sativa. The new structures were established by one- and two-dimensional NMR and in combination with IR, EI/MS, FAB/MS and HR-FAB/ MS. Compound (3) strongly inhibited the growth of duckweed (Lemna paucicostata Hegelm 381), whilst compounds (2) and (4) exhibited weak inhibition.
Chung
Ill Min
IM
Department of Applied Life Science, Konkuk University, Seoul 143-701, South Korea.
Ali
Mohd
M
Ahmad
Ateeque
A
Lim
Jung Dae
JD
Yu
Chang Yeon
CY
Kim
Jin Seog
JS
D029064:Araceae; D006540:Herbicides; D012275:Oryza / Q000737:chemistry*; D010936:Plant Extracts; D013057:Spectrum Analysis / Q000379:methods
D006540:Herbicides; D010936:Plant Extracts