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Stigmastane or 24R-ethylcholestane is a tetracyclic triterpene, along with cholestane and ergostane, this sterane is used as a biomarker for early eukaryotes.
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references standard state triterpene cholestane ergostane sterane biomarker 24r-ethylcholestane tetracyclic along used early eukaryotes 5α-stigmastane 5β-stigmastane see also
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