Pharmacognostical Studies on Umbelliferous Plants. XX

The coumarin derivative constituents of Angelica formosana BOISS. and A. anomala LALL. (Umbelliferae), which have been assigned as the original plants of some kind of Byaku-shi (Chinese crude drug), were examined in order to compare with the coumarin-constituents of Japanese and Chinese Byaku-shi, dried roots of A. dahurica BENTH. et HOOK. var. dahurica and var. pai-chi KIMURA, HATA et YEN, respectively, reported in the preceding paper.Dried root of A. formosana afforded six kinds of furocoumarins, isoimperatorin (I), imperatorin (II), bergapten (III), phellopterin (IV), oxypeucedanin (V), and oxypeucedanin hydrate (VI), and two kinds of white crystalline substances, m. p. 159-160°, C11H10O5 (VII), and m. p. 187-188°, C14H14O4 (VIII), which were presumed from IR spectra as coumarin derivatives having hydroxyl group in their molecules. On the other hand, dried root of A. anomala afforded only two kinds of coumarins, III and umbelliferone (IX), in a small amount and pale-yellow viscid oil which did not crystallize up to the present.The present result seems to suggest that A. formosana is suitable to be regarded as an allied plant of Byaku-shi, but A. anomala should not be assigned for the drug.