A new cytotoxic compound 2 was isolated from a water extract of corn g
erm, Structural elucidation by spectroscopic data and chemical evidenc
e fully substantiated 2 to be 11(E)-10-oxo-11-octadecen-13-olide. Comp
ound 2 exhibited considerably strong cytotoxic activity against variou
s cell lines with IC50 of 0.9-2.8 mu g/ml.