A new class of cyclic hydrocarbon biomarker, macrocyclic-alkanes and their
methylated analogues, have for the first time been unambiguously identified
in a Botryococcus braunii rich sediment (torbanite). The compounds consist
ing of a homologous series of macrocyclic-alkanes (ranging from C-15 to C-3
4) and their methylated derivatives (ranging from C-17 to C-26), were ident
ified by using authentic standards and GC-MS techniques. (C) 2001 Elsevier
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