Two new euglobals from the leaves of Eucalyptus robusta.

Two new euglobals, R1 (1) and R2 (2), together with eight known euglobals (3–10) were isolated from the leaves of Eucalyptus robusta. Their structures were established by means of spectroscopic analysis and single-crystal X-ray diffraction. Euglobal R1 (1) represents a new skeleton of formyl-isovaleryl phloroglucinol-coupled β-phellandrene. [ABSTRACT FROM PUBLISHER]