Abstract

The crystal structures of 1-O-acetylbritannilactone 6 isolated from Inula britannica, and its derivative (2-O-butyloxime-3-phenyl) propionyl 1-O-acetylbritannilactone ester 7 are reported. The structure of synthesized derivative 7 was established by spectroscopic methods. Both compounds inhibited the growth of human HL-60, Bel-7402 cell lines and compound 7 had the stronger cytotoxic activity.

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