Five new acylphloroglucinol glycosides from the leaves of Eucalyptus robusta

Five new acylphloroglucinol glycosides, robustasides A-E (1-5), together with a known one (6), were isolated from the leaves of Eucalyptus robusta. The structures were elucidated on the basis of extensive spectroscopic and spectrometric analysis and chemical evidence. The absolute configuration of 1 was further determined by quantum chemical CD calculation.