A new sesquiterpene/quinol, with mild cytotoxic and antibacterial acti
vity, has been isolated from a New Zealand collection of the liverwort
Riccardia crassa. The structure of this compound, riccardiphenol C [3
], was established by nmr spectroscopy. Closely related compounds prev
iously isolated from a Japanese collection of R. crassa were not detec
ted in this collection.