Flavonoids and Other Chemical Constituents of Fossil Miocene Zelkova (Ulmaceae)

Science  20 May 1977:
Vol. 196, Issue 4292, pp. 877-878
DOI: 10.1126/science.196.4292.877


Organic solvent extractions of Zelkova oregoniana, a Miocene angiosperm compression fossil, indicate the chemical preservation of kaempferol, dihydrokaempferol, an n-alkane chain length range of 10 to 32 carbons, hydroxy acids, steranes, triterpenoids, and methyl pheophorbide a. This appears to be the oldest occurrence of flavonoids in fossil sediments reported.

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