The wood of Eucalyptus globulus contains several pentacyclic diterpenes with oleane, ursane and lupane skeleta. In addition to the well known compounds fl-amyrin, erythrodiol, uvaol, acetyloleanolic, acetylbetulinic, acetylursolic, betulinic, ursolic, 23-hydroxyursolic and trans-p-methoxycinnamoyloxy-ursolic acids, three new triterpenoids have been isolated: methyl cis-p-methoxycinnamoyloxyoleanolate, methyl cis-pmethoxycinnamoyloxyursolate and methyl 11 c~-methoxy-3-acetoxyursolate.