Striatane- and pinguisane-type sesquiterpenoids and phytane-type diterpenoid from the liverwort Porella navicularis

A new pinguisane-type sesquiterpene, naviculol, a new striatane-type sesquiterpene, striatenone, and a new phytane-type diterpene lactone, naviculide have been isolated from the American liverwort, Porella navicularis together with the previously known norpinguisone, norpinguisone methyl ester and perrottetianal, and their structures established by NMR experiments and some chemical transformations.