Nitrogen-containing compounds from Hemerocallis fulva var. sempervirens

As part of our search for sedative substances derived from natural sources, two novel nitrogen compounds, kwansonine C (1) and oxypinnatanine A (2), and two novel salts of quinic acids (4) and (5) were isolated along with four known compounds, fulvanine A (3), icariside D2 (6), sallidroside (7), and (3S,4S)-3,4-dihydroxy-3-methyldihydrofuran-2-one (8), from Hemerocallis fulva L. var. sempervirens. These structures were elucidated by spectroscopic evidence and chemical methods.