Dicyclohexanyl Orizane Constituent from the Hulls of Oryza sativa and its Inhibitory Activity

Abstract

From the hulls of Oryza sativa was isolated one new compound dicyclohexanyl orizane (1) along with several known compounds hentriacontane, 1-tetratriacontanol, b-sitosterol, momilactones A, B, tricin, b-sitosterol-3-O-b-D-glucuronoside, 3,7-dimethyl-n-octan-1-yl benzoate and b-sitosterol-3-O-b-D-glucoside. The structure of the new compound was elucidated by 500 MHz NMR using 1D and 2D spectral methods, viz., ¹H, ¹³C, ¹H-¹H COSY and HETCOR aided by EIMS, FABMS and IR. The compound 1 was found to have no inhibitory effects against duckweed Lemma paucicostata Hegelm 381).