A New Chromone from Angelica dahurica

In this study, a new chromone, six coumarins, and a phenolic compound were isolated from a MeOH extract of an Angelica dahurica stems. Through the use of various spectral techniques, the structures of the isolated compounds were determined to be scopoletin (1), xanthyletin (2), xanthotoxin (3), hopeyhopin (4), thamnosmonin (5), 6-[(1S, 2R)-2,3-dihydroxy-1-methoxy-3-methylbutyl]-7-methoxycoumarin (6), decursidate (7), and new compound 8, named dahuricalol. Among the isolatled and identified compounds, (S)-5-hydroxy-8-(hydroxymethyl)-2,2-dimethyl-6-oxo-3,4-dihydro-2H,6H-pyrano[3,2-g]chromen-3-yl (Z)-2-(hydroxymethyl)but-2-enoate (8) was isolated from plant for the first time.