Abstract The presence of 7-p-cymenylferruginol and its diagenetic biomarkers occurring in Cenozoic fossil plants and Mesozoic siltstones and coals has been studied using gas chromatography-mass spectrometry. Both 7α- and 7β-p-cymenylferruginol isomers were the dominant natural products, with two novel minor additional isomers, namely 3α- and 3β-p-cymenylferruginol, and two hydrocarbons, 7α- and 7β-p-cymenyldehydroabietane. The other tentatively assigned aromatic hydrocarbons were 9,10-p-cymenylretene and 9-p-cymenylsimonellite, which were present in Upper Cretaceous and Lower Jurassic sedimentary rocks with their further dehydrogenation products. Diterpenoid dimers were also tentatively identified in trace amounts, with 11- and 14-ferruginylferruginol as the dominant compounds. Our results show that the p-cymenylferruginols and p-cymenyldehydroabietanes are not thermally stable and that their occurrence in sedimentary rocks is controlled by the maturity of the organic matter (OM). Also, chamaecydin, identified for the first time in pre-Paleogene strata, was not detectable when the OM maturity based on vitrinite reflectance was higher than ∼0.45-0.5% Rr.

中文翻译：

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Monoterpenylabietenoids，来自现存和化石紫杉科和沉积岩的新型生物标志物

摘要 7-p-cymenylferruginol 的存在及其在新生代化石植物和中生代粉砂岩和煤中的成岩生物标志物已使用气相色谱-质谱法进行了研究。7α- 和 7β-p-cymenylferruginol 异构体都是主要的天然产物，有两种新的次要附加异构体，即 3α- 和 3β-p-cymenylferruginol，以及两种烃，7α- 和 7β-p-cymenyldehydroabietane。其他暂定的芳烃是 9,10-p-cymenylretene 和 9-p-cymenylsimonellite，它们存在于上白垩统和下侏罗统沉积岩中，并带有进一步的脱氢产物。还初步确定了痕量的二萜二聚体，其中 11- 和 14- ferruginylferruginol 作为主要化合物。我们的结果表明，对伞花基铁油醇和对伞花基脱氢松香烷不是热稳定的，它们在沉积岩中的出现受有机质 (OM) 成熟度的控制。此外，当基于镜质体反射率的 OM 成熟度高于~0.45-0.5% Rr 时，首次在前古近纪地层中发现的 chamaecydin 无法检测到。