Two new diarylheptanoids from the green walnut husks of Maxim.

Chemical investigation on the 95% ethanol extract of green walnut husks of Maxim. led to the isolation of two new diarylheptanoid compounds, including Juglanin K () and Myricananin I (), together with ten known compounds (). Their structures were elucidated by extensive analyses of comprehensive spectroscopic methods. The isolated compounds were evaluated for their antibacterial activities against and . The results showed that compound had moderate antibacterial activity with the MIC values of 0.313 and 0.156 mg/mL, respectively. compounds , - and showed weakly antibacterial activities against and with the MIC values of 0.625-2.5 mg/mL.