Secondary Metabolites of Adlay (Coix lacryma-jobi var. ma-yuen) Brans

Abstract

A new pyridine, named as 2-(2′,4′-dihydroxypyridin-1′-ium-1′-yl)-3-(4′′-hydroxyphenyl)propanoate (1), as well as (+)-ketopinoresinol (2), sesaminone (3), (+)-lariciresinol (4), (+)-5,5′-dimethoxylariciresinol (5), (7′R)-7′-hydroxy-5′-methoxylariciresinol (6), (7′S)-7′-hydroxy-5′-methoxylariciresinol (7), 9′-O-trans-feruloyl-5′-methoxylariciresinol (8), 9′-O-trans-feruloyl-5,5′-dimethoxylariciresinol (9), and threo-2,3-bis-(4-hydroxy-3-methoxyphenyl)-3-methoxypropanol (10), were isolated from the MeOH extract of the brans of Coix lacryma-jobi L. The structure of the new pyridine was elucidated by chemical and physical evidence.