Jie Chen, Yu-Huan Zhang, Li-Kai Wang, Steven J. Sucheck, Angela M. Snow and Sidney M. Hecht
Fractionation of a hexane extract prepared from the plant Schoepfiacalifornica was carried out by bioassay guided fractionation, affording five inhibitors of DNA polymerase β; four of these were shown to be anacardic acid and structurally related derivatives, while the fifth was oleic acid.