Phenolic Compounds from the Leaves of Castanopsis fargesii.

In the course of a phytochemical and chemotaxonomical investigation of species (Fagaceae), three new phenolic compounds, (3,1')-[1'-(6″--galloyl-β-d-gluco-pyranosyl)oxyethyl]-3-hydroxy-dihydrofuran-2(3)-one (), (2,3)-2-[2'-(galloyl)oxyethyl]-dihydroxybutanoic acid (), and (3,4)-3-hydroxymethyl-3,4-dihydro-5,6,7-trihydroxy-4-(4'-hydroxy-3'-methoxyphenyl)-1-[2]-benzopyran-1-one () were isolated from the fresh leaves of . In addition, a known phenolic glycoside, gentisic acid 5--α-l-rhamnopyranosyl-(1→2)-β-d-glucopyranoside () was also isolated and identified. Their structures were elucidated by means of spectroscopic methods including one- and two-dimensional NMR techniques.