Sesquiterpenoid Constituents of the Liverwort, Ptychanthus striatus (LEhm. et LIndenb.) NEes

Abstract
Four sesquiterpenoids, striatene, striatol, β-monocyclonerolidol and ptychanolide, were isolated from the liverwort Ptychanthus striatus (LEhm. et. LIndenb.)NEes. Their structures have been established by spectroscopic analysis and chemical transformation. Three of them, striatene, striatol and β-monocyclonerolidol, are interesting in terms of the evolution of the liverwort from the algae.