GC-MS characterisation of C27 and C28 triterpanes in sediments and petroleum
作者： John K. Volkman , Robert Alexander , Robert Ian Kagi , Jürgen Rullkötter
DOI: 10.1016/0016-7037(83)90233-8
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摘要: Abstract Earlier studies have shown that an unusual C27 triterpane is abundant in sediments from the Norwegian Continental Shelf and North Sea. This compound was assigned tentative structures 24,28,30-trisnormoretane or 25,28,30-trisnormoretane, but we now detailed retention time measurements a reinterpretation of mass spectral data its correct structure 17α(H),18α (H),21β(H)-25,28,30-trisnorhopane. Two other triterpanes, 25,28,30-trisnormoretane 28,30-bisnormoretane, also been identified as minor constituents extracts Possible origins for these compounds are discussed.
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