biomarkers  search
UFbiological markers
 molecular fossils
RTorganic compounds
 aromatic hydrocarbons
 alkanes
 alkenones
 biostratigraphy
 asphalt
 biodegradation
 first occurrence
 chemical fossils
 diasteranes
 diterpanes
 gammacerane
 geochemical indicators
 hopanes
 hopanoids
 moretanes
 n-alkanes
 oleananes
 porphyrins
 saturat
SNAdded to Thesaurus in 1989.