Fusicoccane diterpenoid

Wu, C-L, Liou C-S, Ean U-J (2001) Fusicoccane Diterpenoids and Bisbibenzyls from the Liverwort Plagiochila peculiaris. J Chin Chem Soc 48 1197... 

Another compound, 18, remained unsolved for quite some time. The % and n.m.r. spectra showed aromatic and methoxyl signals similar to those of 16, hut in addition there were terpenoid-like signals which were mostly always rather broad. On the basis of some limited n.m.r. experiments we proposed working part-structures (which ultimately turned out to be correct as far as they went) of a bibenzyl joined to a fusicoccane diterpenoid through two ether... 

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