Nettersheim, Benjamin; van Maldegem, Lennart; Leider, Arne; Tarozo, Rafael; Hallmann , Christian
Steranes alkylated at position C-3 occur in significant concentrations in many geological
samples (e.g. Fig. 1). However, biological equivalents are not known from any living
organisms and the formation pathway remains equally enigmatic, rendering them some of the
most prominent orphan biomarkers. In some geological samples, the presence of sulphur
functionalities indicated that the 3-alkyl group was originally functionalised, which together
with a dominance of pentyl-derivatives pointed...[Show more]
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