PANTONEUROTRIOLS - PROBABLE BIOGENETIC PRECURSORS OF OXYGENATED MONOTERPENES FROM ANTARCTIC PANTONEURA-PLOCAMIOIDES

Pantoneurotriols 1a and 2a are acyclic polyoxygenated monoterpenes iso lated from the Antarctic endemism Pantoneura plocamioides together wit h compounds 3 and 4. The stereochemistries of these compounds were est ablished by spectroscopic methods and pantoneurotriols have been propo sed as biogenetic precursors of pantofuranoids, uncommon monoterpenes isolated from the same species. It was interesting to find compounds 4 and 5, metabolites first isolated from Plocanium cartilagineum, in a species belonging to a different order such as P. plocamioides. (C) 19 98 Elsevier Science Ltd. All rights reserved.