From the aerial parts of Conyza sophiaefolia a new alicyclic furan diterpen
e was isolated and characterized as an E-isomer in C-6 Of centipedic acid.
In addition, the new clerodane type diterpene 12-epi-bacchotricuneatin A as
well as two known related diterpenoids were identified. The flavone apigen
ine was also isolated. Structures were determined on the basis of spectrosc
opic evidence.