A Study of the Constituents of the Heartwood of Tsuga Chinensis Pritz. Var. Formosana (Hay.)

Abstract
By means of spectroscopic analysis, X‐ray crystallography and chemical correlation the heartwood of Taiwan hemlock was found to contain compounds of sterols, carboxylic acids, 13‐epimanool, o methoxyphenolics, coniferaldehyde, benzofuranoid neolignan, α‐conidendrin, tsugacetal, isolariciresinol, secoisolariciresinol, matairesinol, hydroxymatairesinol and oxomatairesinol. Among them (+)‐tsugacetal is a novel lignan acetal having an α‐conidendrin related structure with the acetal methoxy group at the β‐position.