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Two new flavanones with a C 15 isoprenoid group, japonicasins A and B (1 and 2), were isolated from the leaves of Sophora japonica. This is the first report on the presence of the (2E,7E)-6-isopropyl-3,9-dimethyldeca-2,7,9-trien-1-yl group (C 15 isoprenoid group) in isoprenylated flavonoids. Their structures were determined by spectroscopic methods, including UV, IR, 1D and 2D NMR,...
Phytochemical investigation on the leaves of Artemisia argyi has led to the isolation and identication of a new caffeic acid ester, heptatriacontanyl caffeate (1), along with two known caffeic acid esters, including docosyl caffeate (2) and octadecyl caffeate (3). Their structures were determined by spectroscopic methods (IR, NMR, and MS). The two known compounds were first reported from the title...
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