1087072-50-1

1-O-Acetyl-6beta-O-Isobutyrylbritannilactone (compound 5), a sesquiterpene lactone, can be isolated from the flowers of Inula britannica. 1-O-Acetyl-6beta-O-Isobutyrylbritannilactone shows significant cytotoxicity to tumor cells[1].

[1] Qi J L, et al. Sesquiterpene lactones and their anti-tumor activity from the flowers of Inula britannica. Letters in Drug Design & Discovery, 2008, 5(7): 433-436.