Phenolic constituents from Larix needles III: Benzoic and cinnamic acids of L. leptolepis

Six phenolics were isolated from needles of Larix leptolepis and identified as p-coumaric acid, feiulic acid, p-hydi oxybcnzoic acid, protocatechuic acid, vanillic acid and syringic acid. Different extraction procedures indicated, however, that these compounds only occurred in the needles in a bound form. The finding of free acids had to be attributed to an artifact in the extraction procedure.