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As part of our search for sedative substances from natural sources, we isolated two novel amino acid amides connected with the fructopyranose, kwansonine A (1) and kwansonine B (2), together with three known amino acid amides, longitubanine A (3), longitubanine B (4), and pinnatanine (5), from Hemerocallis fulva L. var. sempervirens (ARAKI) M. HOTTA. The structures of 1 and 2 have been determined on the spectroscopic evidences as N(2)-(1-beta-D-fructopyranosyl)-N(5)-(2',5'-dihydro-2'-furyl-3'-hydroxymethyl)-gamma-hydroxyglutamine and N(2)-(1-beta-D-fructopyranosyl)-N(5)-(2-hydroxymethylbutadienyl)-gamma-hydroxyglutamine. This is the first report on the isolation of amino acid amide N-furctoside from Hemerocallis genus plant.

N-Glycosides of Amino Acid Amides from Hemerocallis fulva var. sempervirens