Chlorophyll Derivatives in Middle Eocene Sediments

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Science  19 Jun 1970:
Vol. 168, Issue 3938, pp. 1447-1449
DOI: 10.1126/science.168.3938.1447


Chloroform extracts of middle Eocene brown coal were made; the chlorophyll derivatives obtained were separated chromatographically. The visible light spectrum, chromatographic behavior, HCl number, infrared spectrum, and mass spectrum of one of the pigments extracted is indicative of methyl pheophorbide a. This is the oldest occurrence of fossil phorbins reported.

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