Chemical investigation of ceylonese plants. Part 24. New chromenoflavonoids from the bark of Artocarpus nobilis Thw. (Moraceae)

Abstract

From the bark extract of Artocarpus nobilis Thw. (Moraceae) six new chromenoflavonoids have been isolated. Five of them have been characterised and named artobilochromen (1), chromanoartobilochromen b(8), (–)-dihydrofuranoartobilochromen a(12), (–)-dihydrofuranoartobilochromen b₁(14), and dihydrofuranoartobilochromen b₂(13). Artobilochromen (1) with formic acid gave chromanoartobilochromens a(7) and b(8), and with dichlorodicyanobenzoquinone gave (±)-dihydrofuranoartobilochromen a(12).