Tigliane Diterpene Esters from the Leaves ofCroton tiglium

Three new tigliane-type diterpene esters, 1–3 with unusual 7-oxo-5-ene or 7-hydroxy-5-ene moieties in their skeletons, were isolated from the leaves of Croton tiglium. Their structures were unambiguously elucidated on the basis of spectroscopic data.