NEOVIBSANINS H AND I, NOVEL DITERPENES FROM VIBURNUM AWABUKI

Neovibsanins H (1) and I (2), novel vibsane-type diterpenes, have been isolated from the leaves of Viburnum awabuki and their structures have been elucidated by spectroscopic analyses. The absolute configuration of 1 has been determined by applying the modified Mosher's method.