The nature and fate of natural resins in the geosphere. XII. Investigation of C-ring aromatic diterpenoids in Raritan amber by pyrolysis-GC-matrix isolation FTIR-MSReportar como inadecuado




The nature and fate of natural resins in the geosphere. XII. Investigation of C-ring aromatic diterpenoids in Raritan amber by pyrolysis-GC-matrix isolation FTIR-MS - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Geochemical Transactions

, 7:2

First Online: 01 March 2006Received: 30 November 2005Accepted: 01 March 2006

Abstract

Upper Cretaceous amber from the Raritan Formation Sayerville, New Jersey has been investigated by Pyrolysis-GC-MS and Pyrolysis-GC-matrix isolation FTIR-MS. Results establish the existence of two distinct forms of amber in this deposit. Both forms are Class Ib ambers, but they are unambiguously differentiated on the basis of their intact diterpenoid composition. The presence of callitrisate in both forms, and cupraene in samples designated form 1, strongly suggest that both derive from related-but-distinct species within the Cupressaceae.

In addition to callitrisate, dehydroabietate and analogous 17-nor-, 16,17-dinor- and 15,16,17-trinor- analogues of these compounds are also observed. The distributions of these products in multiple samples suggest that they are the result of biological emplacement, rather than diagenetic modification of the parent compounds. This indicates that the distributions of diterpenes observed in these samples are representative of the original bioterpenoids and, hence, are useful for chemotaxonomic analyses.

Electronic supplementary materialThe online version of this article doi:10.1186-1467-4866-7-2 contains supplementary material, which is available to authorized users.

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Autor: Ken B Anderson

Fuente: https://link.springer.com/







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