Structural determination of purpurin-18 (as methyl ester) from sedimentary organic matter |
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| Affiliation: | 1. Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran;2. Research Center for Health Sciences, Institute of Health, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran |
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| Abstract: | We report the isolation and structural determination (RP-18 HPLC, UV–VIS, MS, 1H NMR and two-dimensional 1H NMR (COSY and ROESY)) of purpurin-18 (as methyl ester) from geological samples. Existing data suggest that purpurins-18 are derived from chlorophyll or its transformation products by postdepositional, microbially mediated processes in sediments. Diagenetic transformations of purpurins-18 can lead through fossilization to pyrroporphyrins and some ETIO porphyrins isolated from sediments. |
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