Sesquiterpenelactones. I. Chemical constitution of diploid and polyploid of Ambrosia.

Abstract

The sesquiterpene lactone constituents are examd. in diploid, tetraploid, and hexaploid forms of A. dumosa collected during the flowering season, by using thin-layer and column chromatog. Isolated lactones are (compd., m.p., and percent of dried wt. given): parthenolide, 113-14°, diploid 0.023, tetraploid 0.020; coronopilin, 180-1°, diploid 2.600; psilostachyin A, 120-2°, diploid 0.039, hexaploid -; ambrosiol, 217°, diploid 0.506; burrodin, 167-8°, tetraploid 0.305, hexaploid -; psilostachyin C, 226.5-8.5°, tetraploid 0.006; apoludin, 134-5°, tetraploid 0.190, hexaploid -. Biogenetic patterns are discussed. [on SciFinder(R)]