Isolation and structure elucidation of three quinolone alkaloids from Evodia rutaecarpa.

Abstract
Three quinolone alkaloids were isolated from fresh leaves and fruits of Evodia rutaecarpa Hoox. f. et THOMS. and were structurally elucidated as 1-methyl-2-pentadecyl-4 (1H) -quinolone (I), 1-methyl-2-tridecyl-4 (1H) -quinolone (dihydroevocarpine, II) and 1-methyl-2-undecyl-4 (1H) -quinolone (III) on the basis of spectral measurement and synthesis.

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