Monoaromatic steroids

Series of C-ring monoaromatic steroid hydrocarbons (C 21 , C 22 , C 27 C 29 ) and triaromatic steroid hydrocarbons (C 20 , C 21 , C 26 C 28 ) have been recognized in the aromatic hydrocarbon fraction of Alamein crude oil from the western desert, Egypt. Detection of these compounds were based on mass fragmentography of the key ions m / z 253 and m / z 231 and comparison of the mass spectra and relative retention times with literature data. The predominance of the C 29 monoaromatic steroids and C 28 triaromatic steroids provide further evidence for a land plant origin of Alamein oil. The results substantiate previous evidence of the occurrence of an aromatization process with increasing maturation and indicate a moderate maturity level for Alamein oil.

Monoaromatic steroids

monoaromatic steroids

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