Along with three known drimanes, polygodial, 1-beta-(p-methoxycinnamoyl) po
lygodial and mukaadial, the sesquiterpene drimane named drimanial was isola
ted from the bark of Drimys winteri (Winteraceae). Its structure was elucid
ated based on spectroscopic evidence. Drimanial exhibited antinociceptive a
ction against acetic acid induced pain, being about 3-fold less active than
polygodial. (C) 2001 Elsevier Science Ltd. All rights reserved.