In addition to (-)-culantraramine and (-)-culantraraminol the bishofdeninyl
terpene alkaloids, (-)-culantraramine N-oxide, (-)-culantraraminol N-oxide
and avicennamine, have been isolated from the leaves of Zanthoxylum avicen
nae. Their structures have been assigned by MS and especially by NMR invest
igations. (C) 1999 Elsevier Science Ltd. All rights reserved.