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- W1992683410 abstract "Abstract Two tetracyclic triterpene-derived hydrocarbons, des-E-D:C-friedo-25-norhopa-5,7,9-triene 1 and des-E-D:C-friedohop-8-ene 8, have been isolated from an Italian Triassic black shale and identified by MS and NMR spectroscopy. Their structure, the occurrence in the sediment of their ring A methylated counterparts, as well as carbon isotopic data indicate that these compounds originate from bacterial hopanoids. Their formation most probably involves a sedimentary rearrangement of a functionalised des-E-hopane intermediate. This hypothesis was further substantiated by experiments in which 8 was formed from (18αH)-des-E-hopan-17α-ol 10 by treatment with K-10 montmorillonite clay. In addition, some minor unsaturated hydrocarbons formed as by-products are also present in sediments." @default.
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- W1992683410 date "1993-04-01" @default.
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- W1992683410 title "Rearranged des-E-hopanoid hydrocarbons in sediments and petroleum" @default.
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- W1992683410 doi "https://doi.org/10.1016/0146-6380(93)90129-y" @default.
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