Abstract
The IC50 values for the in-vitro inhibition of the prostaglandin synthetase (bovine seminal vesicle mitochondrial fraction) mediated PGE2 production from arachidonic acid by parthenolide, michefuscalide and chrysanthenyl acetate were 11.0 ± 0.44, 121 ± 0.51 and 14.2 ± 0.58 μM (mean ± 95% confidence limits), respectively.