A new norlignan, 2,3-bis-(p-hydroxyphenyl)-2-cyclopntene-l-one, was isolated from the knot resin powder of Araucaria angustifolia. The structure was elucidated by spectroscopic chemical analyses. In addition 4,4'-dihydroxychalcone, cryptoresinol (norlignan), four known lignans and one known norlignan, were isolated for the first time from the resin. A qualitative and quantitative comparison of these compounds in knot, heartwood and sapwood of tl. ~~gu~t~~~iu was performed from the viewpoint of plant chemistry. Detectable amounts of the new compound were present in both knot and heartwood.