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Phytochemical investigation on the ethanol extract of green walnut husks ( Juglans mandshurica  Maxim.) led to the isolation of two previously unknown compounds, including a macrolide compound (13 S )-8-oxo-(9 E , 11 E )-8-oxo-octadeca-9,11-dien-13-olide ( 1 ) and a diarylheptanoid compound 1-(3′-methoxy-4′-hydroxyphenyl)-7-(3″,4″-dimethoxyphenyl)heptan-3-one ( 2 ), together with 19 known compounds. The structures of these 21 compounds were elucidated by extensive analyses of NMR and HR-MS data, and the basis of spectroscopic analysis.

Two novel compounds from green walnut husks ( Juglans mandshurica Maxim.)