Chemical and Chemotaxonomical Studies on Filices. LVIII. Chemical Studies on the Constituents of Monachosorum arakii TAGAWA (Pteridaceae)
A novel pterosin-type dinorsesquiterpene, mukagolactone (I), was isolated from the fronds of Monachosorum arakii TAGAWA (Pteridaceae), along with three new dinorsesquiterpene dimers, monachosorins A (II), B (III) and C (IV).Their structures were elucidate