Sulphate esters of hydroxycinnamic acid—sugar derivatives from Adiantum capillus-veneris

Two new and two known sulphate esters of hydroxycinnamic acid—sugar derivatives have been isolated from the fronds of the fern Adiantum capillus-veneris. The new compounds have been shown to be 1-p-coumarylglucose 2-sulphate and 1-caffeylgalactose 6-sulphate by chemical and spectroscopic methods.     

Kaempferol 3-sulphate in the fern Adiantum capillus-veneris

A new natural product isolated from the fronds of the fern Adiantum capillus-veneris has been shown to be kaempferol 3-sulphate by chemical and spectroscopic methods.     

Triangularin,a new chalcone from Pityrogramma triangularis

2′,6′-Dihydroxy-4′-methoxy-3′-methylchalcone has been isolated from the exudate farina of the ceroptin chemotype of Pityrogramma triangularis. The analogous flavanone was also detected as a minor component in the extract.