Two new compounds, (5S,6S,9S,lOS)-lS-hydroxycadina-3,11-dien-Zone and p-hydroxystyrene fl-vicianoside, together with phydroxystyrene B-D-glucoside, kaempferol3-0-b-D-glucoside, kaempferol 3-0-(2-0-/3-D-xylosyl)- /?-D-glucoside, kaempferol 3-0-(6-p-coumaroyl)-fi-D-glucoside and chlorogenic acid, were isolated from the fronds of Pteridium esculentum. Their structures were elucidated from spectroscopic data.