Perrottetinene is a naturally occurring cannabinoid compound found in liverworts from the family Radulaceae native to Japan, New Zealand and Costa Rica, namely Cladoradula perrottetii, Radula marginata and Radula laxiramea, along with a number of similar compounds. Its chemical structure closely resembles that of THC, the main active component of marijuana but with a cis rather than trans conformation and a bibenzyl tailchain instead of pentyl. The absolute configuration of perrottetinene was established in 2008 by an enantioselective total synthesis.