1-Indanone Derivatives from Bracken, Pteridium aquilinum var. latiusculum

1-Indanone Derivatives from Bracken, Pteridium aquilinum var.latiusculum Bracken is now attracting the attention because of its radiomimetic and carcinogenic properties. 1) From hexane and benzene fractions of methanol extract of air-dried young leaves of bracken, Pteridium aquilinum KUHN var.latiusculum UNDERWOOD (Pteridaceae) (Japanese name, warabi), collected at Hokkaido in June, we have so far isolated six 1-indanone derivatives by chromatographic separation.This communication concerns with the structure elucidation of these compounds.