Abstract
Distribution of taxifolin 3-glucoside (A), taxifolin 3'-glucoside (B), isoquercitrin (C), and d-catechol (D) was examined in the leaves of 28 kinds of Pinaceae Plants, using thin-layer chromatography. It was found that A is a specific component present only in the Chamaecyparis spp., while B is totally absent and C is present in about one-half of the plants examined. Component D was present in all these plants.