Microhelenin C is a sesquiterpene lactone isolated from Helenium microcephalum, with antitumor activity[1].
[1]. Y Imakura, et al. Antitumor agents XXXVI: Structural elucidation of sesquiterpene lactones microhelenins-A, B, and C, microlenin acetate, and plenolin from Helenium microcephalum. J Pharm Sci. 1980 Sep;69(9):1044-9.
















