Chemical constituents of rice (Oryza sativa) hulls and their herbicidal activity against duckweed (Lemna paucicostata Hegelm 381) |
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Authors: | Chung Ill Min Ali Mohd Ahmad Ateeque Lim Jung Dae Yu Chang Yeon Kim Jin Seog |
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Affiliation: | Department of Applied Life Science, Konkuk University, Seoul 143-701, South Korea. |
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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. |
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Keywords: | Structure determination stigmastanol‐3β‐p‐glyceroxydihydrocoumaroate stigmastanol‐3β‐p‐butanoxydihydrocoumaroate, lanast‐7,9(11)‐dien‐3α,15α‐diol‐3α‐d‐glucofuranoside 1‐phenyl‐2‐hydroxy‐3,7‐dimethyl‐11‐aldehydic‐tetradecane2‐β‐d‐glucopyranoside Oryza sativa L Poaceae |
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