Insect Antifeedant Benzofurans from Species.

In this work, we have studied the benzofurans of (aerial parts and transformed roots), (aerial parts and transformed roots), (aerial parts), and (aerial parts and roots). This work has permitted the isolation of the new benzofurans 10-ethoxy-11-hydroxy-10,11-dihydroeuparin (), (-)-eupachinin A ethyl ether (), 11,15-didehydro-eupachinin A (), 10,12-dihydroxy-11-angelyloxy-10,11-dihydroeuparin (), 2,4-dihydroxy-5-formyl-acetophenone () isolated for the first time as a natural product, 11-angelyloxy-10,11-dihydroeuparin (), and 12-angelyloxyeuparone (), along with several known ones (-). In addition, the incubation of the abundant component, 6-hydroxytremetone (), with the fungus has been studied.