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Terpenoid composition and botanical affinity of Cretaceous resins from India and Myanmar

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Title: Terpenoid composition and botanical affinity of Cretaceous resins from India and Myanmar
Authors: Dutta, Suryendu1 s.dutta@iitb.ac.in, Mallick, Monalisa1, Kumar, Kishor2, Mann, Ulrich3, Greenwood, Paul F.4
Source: International Journal of Coal Geology. Jan2011, Vol. 85 Issue 1, p49-55. 7p.
Subjects: Terpenes, Fossil resins, Cretaceous stratigraphic geology, Gas chromatography/Mass spectrometry (GC-MS), Sediments, Pyrolysis
Geographic Terms: Meghalaya (India), India, Myanmar
Abstract: Abstract: Fossil resins from the Cretaceous sediments of Meghalaya, India and Kachin, Myanmar (Burma) were analysed using Curie point pyrolysis–gas chromatography–mass spectrometry and thermochemolysis gas chromatography–mass spectrometry to help elucidate their botanical source. The major pyrolysis products and methyl-esterified thermochemolysis products of both the resins were abietane and labdane type diterpenoids with minor amount of sesquiterpenoids. The thermochemolysis products also included methyl-16,17-dinor callitrisate, methyl-16,17-dinor dehydroabietate and methyl-8-pimaren-18-oate—the latter two from just the Myanmarese resin. The exclusive presence of both labdane and abietane diterpenoids and the lack of phenolic terpenoids may suggest that the studied Cretaceous resins were derived from Pinaceae (pine family) conifers. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Abstract: Fossil resins from the Cretaceous sediments of Meghalaya, India and Kachin, Myanmar (Burma) were analysed using Curie point pyrolysis–gas chromatography–mass spectrometry and thermochemolysis gas chromatography–mass spectrometry to help elucidate their botanical source. The major pyrolysis products and methyl-esterified thermochemolysis products of both the resins were abietane and labdane type diterpenoids with minor amount of sesquiterpenoids. The thermochemolysis products also included methyl-16,17-dinor callitrisate, methyl-16,17-dinor dehydroabietate and methyl-8-pimaren-18-oate—the latter two from just the Myanmarese resin. The exclusive presence of both labdane and abietane diterpenoids and the lack of phenolic terpenoids may suggest that the studied Cretaceous resins were derived from Pinaceae (pine family) conifers. [ABSTRACT FROM AUTHOR]
ISSN:01665162
DOI:10.1016/j.coal.2010.09.006