A new abietane diterpene, named abietopinoic acid, and a new podocarpane diterpene, named podopinoic acid, were isolated from the acetone extract of the heartwood of Pinus massoniana. Their structures were established as 12-hydroxy-7-oxoabieta-8,11,13-trien-18-oic acid (1) and 13-hydroxy-7-oxopodocarpane (2) by means of spectroscopic analyses including 2D-NMR. To the best of our knowledge, this is the second report of a podocarpa-8,11,13-trien-18-oic acid diterpene, isolated from the genus Pinus.
