STRUCTURES OF THREE NEW ENT-LONGIPINANE TYPE SESQUITERPENOIDS FROM THE LIVERWORT MARSUPELLA EMARGINATA SUBSP. TUBULOSA
Three new sesquiterpenoids were isolated from the liverwort Marsupella emarginata subsp. tubulosa. The structures and absolute configurations of the compounds have been shown to be (−)-marsupellone(1), (+)-marsupellol(2) and (+)-acetoxymarsupellone(3), containing an ent-longipinane skeleton, on the basis of chemical and spectral evidence.