A chemical examination of the tannin ingredients in the leaves of the wood oil tree, Aleurites fordii HEMSLEY (Euphorbiaceae), has led to the isolation of three new ellagitannins named aleurinins A (4), B (5) and C (6), together with corilagin (1), geraniin (2) and chebulagic acid (3). On the basis of chemical and spectroscopic evidence, the structures of aleurinins A(4) and B(5) have been established as ellagitannins possessing a novel cyanopropylene alcohol glucoside core, while aleurinin C (6) has been characterized as an ellagitannin based on a hydroxyacetone glucoside core.