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Two diterpene acids have been isolated from Phebalium rude Bartl. One of these has been identified as (-)-kaur-16-en-19-oic acid (1), and the other has been shown to be 15β-hydroxy-(-)-kaur-16-en-19-oic acid (111). This work appears to provide the first record of the isolation of diterpenes from a member of the Rutaceae.

The structure (II) has been assigned to the coumarin phebalosin, obtained from Phebalium tuberculosum and P. drummondii.

Rutin, 2,5-dihydroxycinnamic acid (5), methyl 4-hydroxycinnamate (6), and a mixture of novel macrocyclic phenols have been isolated from the leaves of Grevillea robusta A. Cunn. The major macrocyclic phenol, robustol, has been shown to have the structure (8) by the application of physical methods and by degradation of robustol trimethyl ether (9) to give 3-[14?-(3?,5?-dimethoxyphenyl)tetradec-1?-yl]-5-methoxy-phenol (34). Three of the minor macrocyclic phenols have been assigned tentative structures (11), (12), and (13).