title: Chemical constituents of rice (Oryza sativa) hulls and their herbicidal activity against duckweed (Lemna paucicostata Hegelm 381).
abstract: 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.
authors.affiliation: Department of Applied Life Science, Konkuk University, Seoul 143-701, South Korea.
authors.forename: Ill Min
authors.initials: IM
authors.lastname: Chung
authors.forename: Mohd
authors.initials: M
authors.lastname: Ali
authors.forename: Ateeque
authors.initials: A
authors.lastname: Ahmad
authors.forename: Jung Dae
authors.initials: JD
authors.lastname: Lim
authors.forename: Chang Yeon
authors.initials: CY
authors.lastname: Yu
authors.forename: Jin Seog
authors.initials: JS
authors.lastname: Kim
mesh_terms: D029064:Araceae; D006540:Herbicides; D012275:Oryza / Q000737:chemistry*; D010936:Plant Extracts; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D006540:Herbicides; D010936:Plant Extracts