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Pure Appl. Chem.
74(11), 2207-2221, 2002
Pure and Applied
Vol. 74, Issue 11
Evolution of the secondary metabolite versus evolution of the species*
Centro Linceo Interdisciplinare Beniamino Segre
via della Lungara 10, I-00165 Roma, Italy
Abstract: Four stereochemical series of diastereomeric polyhalogenated
chamigrane sesquiterpenes -headed by obtusol, isoobtusol, rogiolol,
and cartilagineol- suggest the existence of four lineages of red seaweeds
in the genus Laurencia.On another front, concerning marine ciliates,
euplotane sesquiterpenes characterize worldwide the morphospecies Euplotes
crassus, well differentiated from Euplotes raikov, Euplotes rariseta,
and Euplotes vannus, which furnish different-skeleton sesquiterpenoids,
and the latter also C30-backbone isoprenoids. The latter
three morphospecies, however, show polymorphism in the variability of
* Lecture presented at the 22nd IUPAC International
Symposium on the Chemistry of Natural Products, São Carlos, Brazil,
3-8 September 2000.
Other presentations are published in Pure
Appl. Chem. 73(3), 395-548
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