Chemical constituents of the stem of Piper aurantiacum Miq.

Abstract

The dried stems of Piper aurantiacum Miq. were extracted with organic solvents. The crude extracts were chromatographed on silica gel by using quick column chromatography and 5 compounds were identified. These compounds were confirmed by chemical reactions, physical testing and spectroscopic methods and were assigned as β -sitosterol (C29H26O, m.p. 137-138°c, bright white needle-like crystals), methyl-5-(3',4'-methylenedioxyphenyl)penta- 2,4-dienoate (methyl piperate, m.p. 142-143°c, C13H12O4, yellow needle-like crystals), endo-l,7,7-trimethylbicyclo[2.2.1]heptan-2-ol-3'-(4'-hydroxyphenyl)-2'-propenoate (bomeol p-coumarate, C19H24O3, m.p. 158-159°c, colourless rectangular drystals), l,3-benzodioxole-5-carboxylic acid (C8H6O4, white amorphous solid) and potassium chloride (KC1, m.p. was over 270°c, colourless cubical crystals).