MACROCARPAL-H, MACROCARPAL-I, AND MACROCARPAL-J FROM THE LEAVES OF EUCALYPTUS-GLOBULUS

A 50% EtOH extract of Eucalyptus globulus leaves yielded eight phlorog lucinol-sesquiterpene-coupled constituents, including three novel comp ounds named macrocarpals H, I, and J. Some of these compounds possesse d antibacterial activity against oral pathogenic microorganisms with M IC values ranging from 0.20 mu g/mL to 6.25 mu g/mL. Inhibition of glu cosyltransferase activity by these compounds was also noted.