THREE MEXICANOLIDES FROM THE ROOT BARK OF ENTANDROPHRAGMAANGOLENSE

摘要

Three new mexicanolide-type rings B,D-seco limonoids were isolated together with four known rings B,D-seco compounds,methyl angolensate,secomahoganin,3P-hydroxy-3-deoxycarapin,and xyloccensin K from the root bark of a meliaceous plant Entandrophragma angolense.The structure of these new compounds was elucidated by spectrospcopic means.The antifeedant property of the isolated compounds is also briefly described.